What Is The E46 M3 OBD2 C2500 Trouble Code?

The E46 M3 Obd2 C2500 Trouble Code can indicate a variety of issues with your vehicle. In this comprehensive guide, we at MERCEDES-DIAGNOSTIC-TOOL.EDU.VN, will give you all you need to know about the e46 m3 obd2 c2500 trouble code, including what it means, what causes it, how to diagnose it, and how to fix it. We’ll give you actionable solutions for keeping your Mercedes-Benz in top shape, supported by experience and reliability.

1. Understanding the E46 M3 OBD2 C2500 Trouble Code

The E46 M3 OBD2 C2500 trouble code refers to a specific diagnostic trouble code (DTC) that may appear when diagnosing issues with the On-Board Diagnostics II (OBD2) system of an E46 M3 vehicle. It provides technicians and vehicle owners with insights into potential problems within the vehicle’s systems.

1.1 What is an OBD2 Trouble Code?

OBD2 trouble codes are standardized codes used in the automotive industry to identify specific issues or malfunctions within a vehicle’s systems. These codes are generated by the vehicle’s onboard computer, which monitors various sensors and components to ensure optimal performance and emissions control. When a problem is detected, the computer stores a corresponding trouble code, which can be accessed using a diagnostic scan tool.

1.2 Decoding the C2500 Trouble Code

The C2500 trouble code typically indicates an issue within the vehicle’s chassis system. While the specific meaning of the code may vary depending on the vehicle manufacturer and model, it often relates to problems with the ABS, stability control, or other chassis-related components. To accurately diagnose the issue, it’s essential to consult the vehicle’s service manual or a reliable database of OBD2 codes.

2. Common Causes of the E46 M3 OBD2 C2500 Trouble Code

Several factors can contribute to the occurrence of the E46 M3 OBD2 C2500 trouble code. Understanding these common causes is crucial for effective diagnosis and repair.

2.1 ABS Sensor Malfunctions

Faulty or damaged ABS sensors are a frequent cause of the C2500 trouble code. These sensors monitor the rotational speed of the wheels and provide data to the ABS module, which is essential for proper braking and stability control. When an ABS sensor fails or provides inaccurate readings, it can trigger the C2500 code.

2.2 Wiring and Connector Issues

Damaged or corroded wiring and connectors in the ABS system can also lead to the C2500 trouble code. These issues can disrupt the electrical signals between the ABS sensors, module, and other components, resulting in communication errors and diagnostic codes.

2.3 ABS Module Failure

In some cases, the C2500 trouble code may indicate a problem with the ABS module itself. This module is responsible for processing data from the ABS sensors and controlling the hydraulic components of the braking system. If the module malfunctions, it can trigger the C2500 code and impair the vehicle’s braking performance.

2.4 Hydraulic Problems

Hydraulic issues within the ABS system, such as a faulty pump, valve, or accumulator, can also cause the C2500 trouble code. These problems can affect the system’s ability to regulate brake pressure and maintain stability, leading to diagnostic codes and compromised safety.

3. Diagnosing the E46 M3 OBD2 C2500 Trouble Code

Proper diagnosis is essential for accurately identifying the root cause of the E46 M3 OBD2 C2500 trouble code and implementing effective repairs. Here’s a step-by-step guide to diagnosing the issue:

3.1 Scan the OBD2 System

Use a diagnostic scan tool to retrieve all stored trouble codes from the vehicle’s OBD2 system. This will provide valuable information about the nature and severity of the problem.

3.2 Inspect ABS Sensors

Visually inspect the ABS sensors at each wheel for signs of damage, such as cracks, corrosion, or loose connections. Use a multimeter to check the sensor’s resistance and signal output, comparing the readings to the manufacturer’s specifications.

3.3 Check Wiring and Connectors

Thoroughly inspect the wiring and connectors in the ABS system for any signs of damage or corrosion. Use a wiring diagram to trace the circuits and ensure proper continuity. Clean or replace any damaged components as needed.

3.4 Test the ABS Module

If the ABS sensors and wiring appear to be in good condition, test the ABS module using a specialized diagnostic tool. This will allow you to check the module’s functionality, communication capabilities, and internal components.

3.5 Evaluate Hydraulic Components

Assess the hydraulic components of the ABS system, including the pump, valves, and accumulator, for any signs of leakage, contamination, or malfunction. Use a pressure gauge to check the system’s hydraulic pressure and ensure it meets the manufacturer’s specifications.

4. Repairing the E46 M3 OBD2 C2500 Trouble Code

Once you’ve diagnosed the root cause of the E46 M3 OBD2 C2500 trouble code, it’s time to implement the necessary repairs. Here are some common repair procedures:

4.1 Replace Faulty ABS Sensors

If an ABS sensor is found to be defective, replace it with a new, high-quality sensor. Ensure that the replacement sensor is compatible with the vehicle’s make and model.

4.2 Repair or Replace Damaged Wiring

Repair any damaged wiring or connectors in the ABS system by splicing in new wires or replacing the entire harness section. Use proper soldering and insulation techniques to ensure a reliable connection.

4.3 Replace the ABS Module

If the ABS module is determined to be faulty, replace it with a new or remanufactured unit. Before installation, ensure that the replacement module is properly programmed and calibrated to the vehicle’s specifications.

4.4 Address Hydraulic Issues

If hydraulic problems are identified, address them by replacing the faulty pump, valve, or accumulator. Bleed the ABS system to remove any trapped air and ensure proper brake function.

4.5 Clear Trouble Codes and Retest

After completing the repairs, use a diagnostic scan tool to clear all stored trouble codes from the OBD2 system. Perform a road test to verify that the C2500 trouble code does not return and that the ABS system is functioning properly.

5. Preventing the E46 M3 OBD2 C2500 Trouble Code

While some issues are unavoidable, there are steps you can take to minimize the risk of encountering the E46 M3 OBD2 C2500 trouble code:

5.1 Regular Maintenance

Follow the manufacturer’s recommended maintenance schedule for your E46 M3, including regular inspections of the braking system and ABS components.

5.2 Proper Driving Habits

Avoid aggressive driving maneuvers that can put excessive strain on the ABS system, such as sudden braking or sharp turns.

5.3 Prompt Repairs

Address any warning signs or symptoms of ABS problems promptly to prevent further damage and potential trouble codes.

5.4 Quality Parts

When replacing ABS components, use only high-quality parts from reputable manufacturers to ensure reliable performance and longevity.

6. Choosing the Right Diagnostic Tools

Selecting the right diagnostic tools is crucial for effectively troubleshooting and repairing the E46 M3 OBD2 C2500 trouble code. Here are some recommended tools:

6.1 OBD2 Scan Tool

A reliable OBD2 scan tool is essential for retrieving trouble codes, monitoring sensor data, and performing diagnostic tests.

6.2 Multimeter

A multimeter is necessary for checking the resistance, voltage, and continuity of ABS sensors, wiring, and other electrical components.

6.3 ABS Diagnostic Tool

A specialized ABS diagnostic tool can provide advanced testing capabilities, such as ABS module programming, calibration, and hydraulic system analysis.

6.4 Wiring Diagram

A comprehensive wiring diagram for the E46 M3 ABS system is invaluable for tracing circuits and identifying wiring issues.

7. How MERCEDES-DIAGNOSTIC-TOOL.EDU.VN Can Help

At MERCEDES-DIAGNOSTIC-TOOL.EDU.VN, we are committed to providing you with the highest quality diagnostic tools and repair solutions for your Mercedes-Benz vehicle. Our expert technicians can assist you in diagnosing and resolving the E46 M3 OBD2 C2500 trouble code, ensuring that your vehicle remains safe and reliable.

7.1 Diagnostic Services

We offer comprehensive diagnostic services using state-of-the-art equipment to accurately identify the root cause of the C2500 trouble code.

7.2 Repair Solutions

Our skilled technicians can perform the necessary repairs, including ABS sensor replacement, wiring repairs, ABS module replacement, and hydraulic system servicing.

7.3 Quality Parts

We use only high-quality, OEM-approved parts to ensure reliable performance and longevity.

7.4 Expert Advice

Our knowledgeable staff can provide you with expert advice and guidance on how to prevent future ABS problems and maintain your vehicle in top condition.

8. Understanding OBD2 Systems

To fully grasp the context of the C2500 trouble code, it’s important to understand the fundamentals of the OBD2 system.

8.1 Evolution of OBD Systems

The OBD system has evolved significantly over the years. The original OBD system was introduced in the 1980s to monitor emissions-related components. OBD2, introduced in the mid-1990s, provided a standardized system for monitoring a wider range of vehicle systems, including the engine, transmission, and ABS.

8.2 OBD2 System Components

The OBD2 system consists of several key components, including:

• Sensors: These devices monitor various parameters, such as engine speed, temperature, and oxygen levels.
• Engine Control Unit (ECU): The ECU processes data from the sensors and controls various engine functions.
• Diagnostic Trouble Codes (DTCs): These codes are stored in the ECU when a problem is detected.
• Diagnostic Connector: This port allows technicians to connect a scan tool to the OBD2 system.

8.3 Reading and Interpreting OBD2 Data

A diagnostic scan tool is used to read and interpret OBD2 data. The scan tool can display DTCs, sensor readings, and other useful information for diagnosing vehicle problems.

9. Advanced Diagnostic Techniques

For complex issues, advanced diagnostic techniques may be required to pinpoint the root cause of the C2500 trouble code.

9.1 Oscilloscope Testing

An oscilloscope can be used to analyze the waveform of electrical signals in the ABS system. This can help identify intermittent problems or signal distortions that may not be apparent with a multimeter.

9.2 Data Logging

Data logging involves recording sensor data over time while the vehicle is in operation. This can help identify patterns or anomalies that may be contributing to the C2500 trouble code.

9.3 Component Activation

Some diagnostic tools allow technicians to activate individual components in the ABS system, such as the pump or valves. This can help isolate problems and verify the functionality of specific parts.

10. Importance of Regular Inspections

Regular inspections are crucial for maintaining the health and safety of your E46 M3.

10.1 Brake System Inspections

Regular brake system inspections should include checking the brake pads, rotors, calipers, and hydraulic lines. Any signs of wear or damage should be addressed promptly.

10.2 ABS System Inspections

ABS system inspections should include checking the ABS sensors, wiring, and module. Any trouble codes or warning lights should be investigated immediately.

10.3 Fluid Checks

Regularly check the brake fluid level and condition. Brake fluid should be replaced according to the manufacturer’s recommendations to prevent corrosion and maintain optimal braking performance.

11. Common Mistakes to Avoid

When diagnosing and repairing the C2500 trouble code, it’s important to avoid common mistakes that can lead to misdiagnosis or further damage.

11.1 Neglecting Basic Checks

Before diving into advanced diagnostics, always perform basic checks, such as visually inspecting the ABS sensors and wiring.

11.2 Ignoring Trouble Code Definitions

Always consult the trouble code definitions in the vehicle’s service manual or a reliable database.

11.3 Using Low-Quality Parts

Using low-quality replacement parts can compromise the performance and reliability of the ABS system.

11.4 Neglecting Proper Calibration

After replacing the ABS module, be sure to properly program and calibrate it to the vehicle’s specifications.

12. Real-World Examples

To provide a better understanding of the C2500 trouble code, here are a few real-world examples:

12.1 Example 1

A customer brought in their E46 M3 with the ABS warning light illuminated. A scan of the OBD2 system revealed the C2500 trouble code. After inspecting the ABS sensors, it was discovered that one of the sensors had a cracked housing and was providing inaccurate readings. Replacing the faulty sensor resolved the issue and cleared the trouble code.

12.2 Example 2

Another customer reported that their E46 M3 had poor braking performance and the ABS warning light was on. A scan of the OBD2 system revealed the C2500 trouble code. After further investigation, it was found that the ABS module had failed. Replacing the ABS module and programming it to the vehicle’s specifications restored the ABS system to proper working order.

12.3 Example 3

A customer complained that their E46 M3 had intermittent ABS problems. A scan of the OBD2 system revealed the C2500 trouble code. After checking the wiring in the ABS system, it was discovered that a connector was corroded and causing intermittent signal disruptions. Cleaning the connector and applying dielectric grease resolved the issue.

13. The Role of Software in Diagnostics

Modern vehicle diagnostics increasingly rely on software. Proper software updates and compatibility are essential for accurate diagnostics and repairs.

13.1 Software Updates for Diagnostic Tools

Ensure that your diagnostic tools have the latest software updates. These updates often include new trouble code definitions, diagnostic procedures, and compatibility enhancements.

13.2 Vehicle Software Updates

Keep the vehicle’s software up-to-date as well. Manufacturers frequently release software updates to address known issues and improve performance.

13.3 Compatibility Issues

Be aware of potential compatibility issues between diagnostic tools and vehicle software. Some older tools may not be fully compatible with newer vehicles, and vice versa.

14. Cost Considerations

Understanding the costs associated with diagnosing and repairing the C2500 trouble code can help you make informed decisions.

14.1 Diagnostic Costs

Diagnostic costs can vary depending on the complexity of the issue and the labor rates of the repair shop.

14.2 Repair Costs

Repair costs can vary depending on the parts needed and the labor involved. Replacing an ABS sensor is typically less expensive than replacing an ABS module.

14.3 Preventative Maintenance Costs

Investing in preventative maintenance can help avoid costly repairs in the future.

15. Benefits of Professional Service

While some repairs can be performed by experienced DIYers, seeking professional service offers several benefits.

15.1 Expertise

Professional technicians have the expertise and experience to accurately diagnose and repair complex issues.

15.2 Specialized Tools

Professional repair shops have specialized tools and equipment for diagnosing and repairing ABS systems.

15.3 Warranty

Professional repairs often come with a warranty, providing added peace of mind.

16. OBD2 Test Portion of a Smog Check Inspection

Understanding the OBD2 test portion of a smog check inspection is important for vehicle owners in areas with emissions testing requirements.

16.1 Readiness Monitors

Readiness monitors are self-tests performed by the vehicle’s OBD system to verify emission control functionality. The number of incomplete OBD readiness monitors that are allowed to pass the OBD test portion of a Smog Check inspection are provided below.

Model Year	Fuel Type	Number of Incomplete Monitors Allowed to Pass OBD Test1
1996-1999	Gas2	Any one3
2000 and newer	Gas2	Evaporative system3
1998-2006	Diesel	Zero
2007 and newer	Diesel	Particulate Filter and Non-Methane HydroCarbon (NMHC)4

1 Implemented May 4, 2015.

2 “Gas” includes gasoline, propane, natural gas (CNG, LNG, LPG).

3 The misfire, fuel, and comprehensive component continuous monitors are ignored during an OBD test on “gas” vehicles.

4 Implemented July 5, 2023.

16.2 Malfunction Indicator Lamp Standards

The Malfunction Indicator Lamp (MIL or “Check Engine” light) related failure standards for the OBD test portion of a BAR-97 and OIS inspection are provided below.

Vehicle	Pass/Fail	Standard
All with OBDII	Pass	MIL illuminates when key on engine off (KOEO).
All with OBDII	Pass	MIL turns off when engine running (KOER).
All with OBDII	Fail	MIL does not illuminate when key on engine off (KOEO).
All with OBDII	Fail	MIL illuminates when engine running (KOER).

16.3 Communication Standards

Vehicle communication standards for the OBD test portion of a BAR-97 and OIS inspection are provided below.

Vehicle	BAR-97/OIS	Standard
All with OBDII	BAR-97	Vehicle communicates with BAR-97.
All with OBDII	OIS	Vehicle communicates with OIS and transmits required data.1

1 Required data typically means data from OBD addresses: Mode $01 PID $00, Mode $01 PID $01. Mode $01 PID $00 returns what data is supported on the vehicle. Mode $01 PID $01 returns MIL status, diagnostic trouble codes (DTCs), and monitor status.

16.4 Permanent Diagnostic Trouble Code Standards

PDTC standards for the OBD test portion of an OIS inspection are provided below.

Model Year	BAR-97/OIS	Standard
1996-1999	BAR-97	Not applicable.
2000-2009	OIS	Not applicable.
2010 and newer 1	OIS	Vehicles fail when a PDTC is present. 2,3,4,5

1 Some 2010 vehicles do not support PDTC. Those without support for PDTC will not be subject to the PDTC check.

2 A vehicle with a PDTC stored will fail the PDTC check regardless of whether the MIL is commanded ON or OFF.

3 PDTC presence will be ignored if the vehicle has completed at least 15 warm-up cycles and been driven at least 200 miles since its OBD information was last cleared (as determined by Mode $01 PID $30 and $31).

4 BAR is aware of some vehicles that have trouble properly clearing certain PDTCs. BAR is working with the California Air Resources Board (CARB) to ensure that known problematic vehicles are addressed by vehicle manufacturers. Until then, these codes will be ignored by BAR-OIS. For more information, see Permanent Diagnostic Trouble Code Vehicles of Interest.

5 Vehicle manufacturers have issued extended warranties, recalls and repair campaigns for some vehicles that have trouble properly clearing PDTCs. These vehicles are listed under Permanent Diagnostic Trouble Code Vehicles of Interest. When one of these vehicles fails for the PDTC, please refer the motorist to the dealer for covered repairs.

16.5 Modified Software Standards

Vehicles identified with illegally modified software will fail the Smog Check inspection. The vehicle inspection report will show Modified Software for the overall inspection result.

17. Vehicles of Interest

Gasoline and flex-fuel vehicles that are model-year 2000 and newer and diesel vehicles that are model-year 1998 and newer that have known pattern issues with the OBD test portion of an OIS inspection are provided below.

Make	Year	Model Engine (L); Fuel Type	Issue	Cause and Possible Remedy	Instruction to Inspector
Audi	2000-2004	A4 & A6	Fail for no OBD communication. No response or Only Transmission Control Module responds to DADs requests. ABS and/or brake lamp illuminated in instrument panel cluster.	Broken ground bond wire in ABS module causes diagnostic communication issues with the ABS module, ECM, and TCM. Diagnose and repair per Audi TSB #A45-15-10.	Likely broken vehicle. Repair and retest.
BMW	6/1/99 – 7/31/00	323i Sedan	May not pass inspection due to oxygen sensors readiness monitor not set/not fitted/not supported.	DME Software error. Reprogram DME with the updated software.	Check the DME “programmed control unit” number listed in TSB #SI B12 16 16 and follow TSB instructions.
BMW	9/3/99 – 7/31/00	323iT Touring	May not pass inspection due to oxygen sensors readiness monitor not set/not fitted/not supported.	DME Software error. Reprogram DME with the updated software.	Check the DME “programmed control unit” number listed in TSB #SI B12 16 16 and follow TSB instructions.
BMW	6/1/99 – 7/29/00	323Ci Coupe	May not pass inspection due to oxygen sensors readiness monitor not set/not fitted/not supported.	DME Software error. Reprogram DME with the updated software.	Check the DME “programmed control unit” number listed in TSB #SI B12 16 16 and follow TSB instructions.
BMW	6/23/99 – 7/29/00	323 Cic Convertible	May not pass inspection due to oxygen sensors readiness monitor not set/not fitted/not supported.	DME Software error. Reprogram DME with the updated software.	Check the DME “programmed control unit” number listed in TSB #SI B12 16 16 and follow TSB instructions.
BMW	2000	M52 (TU) engine	May not pass inspection due to oxygen sensors readiness monitor not set/not fitted/not supported.	DME Software error. Reprogram DME with the updated software.	Check the DME “programmed control unit” number listed in TSB #SI B12 16 16 and follow TSB instructions.
BMW	2000	Fail for readiness. Vehicle may not set oxygen sensor readiness monitor.	Software error in ECM. Reflash ECM per Recall #00E-A01. See BMW bulletin #SI B 12 15 99, dated November 2000.	Vehicle requires reflash. Reflash ECM per recall so oxygen sensor monitor will set.
BMW	built 3/98 – 7/99	323i, 323iA, 328i, 328iA	Fail for readiness. Vehicle may not set oxygen sensor readiness monitor.	Software error in ECM. Reflash ECM per Recall #00E-A01. See BMW bulletin #SI B 12 15 99, dated November 2000.	Vehicle requires reflash. Reflash ECM per recall so oxygen sensor monitor will set.
BMW	built 2/99 – 7/99	328iC, 328iCA, 323iC, 323iCA, 528i, 528iA, 528iT, 528iAT	Fail for readiness. Vehicle may not set oxygen sensor readiness monitor.	Software error in ECM. Reflash ECM per Recall #00E-A01. See BMW bulletin #SI B 12 15 99, dated November 2000.	Vehicle requires reflash. Reflash ECM per recall so oxygen sensor monitor will set.
BMW	built 9/98 – 7/99	Z3 roadster 2.3	Fail for readiness. Vehicle may not set oxygen sensor readiness monitor.	Software error in ECM. Reflash ECM per Recall #00E-A01. See BMW bulletin #SI B 12 15 99, dated November 2000.	Vehicle requires reflash. Reflash ECM per recall so oxygen sensor monitor will set.
BMW	built 4/99 – 7/99	Z3 roadster coupe/ roadster 2.8	Fail for readiness. Vehicle may not set oxygen sensor readiness monitor.	Software error in ECM. Reflash ECM per Recall #00E-A01. See BMW bulletin #SI B 12 15 99, dated November 2000.	Vehicle requires reflash. Reflash ECM per recall so oxygen sensor monitor will set.
BMW	2001-2003	Z3 M Roadster/coupe with S54 engine	Fail for no communication when ignition switched off/on. OBD communication always possible with BMW DIS or GT1 tester.	Voluntary Emissions Recall Campaign to reprogram the engine control units (DME) on all affected vehicles. Bulletin #SI B12 11 06 dated October 2007.	Follow OIS prompts. Connect/disconnect DAD when key off.
BMW	2000-2003	Z8 & M5 with S62 engine	Fail for no communication when ignition switched off/on. OBD communication always possible with BMW DIS or GT1 tester.	Voluntary Emissions Recall Campaign to reprogram the engine control units (DME) on all affected vehicles. Bulletin #SI B12 11 06 dated October 2007.	Follow OIS prompts. Connect/disconnect DAD when key off.
BMW	From series intro. up to 8/27/2004	M3 with S54 engine	Fail for no communication when ignition switched off/on. OBD communication always possible with BMW DIS or GT1 tester.	Voluntary Emissions Recall Campaign to reprogram the engine control units (DME) on all affected vehicles. Bulletin #SI B12 11 06 dated October 2007.	Follow OIS prompts. Connect/disconnect DAD when key off.
BMW	2003	M3	Failure to set EGR monitor.	Check thermostat	Likely broken vehicle. Repair and retest.
BMW	2007	328i	Engine dies during OBD Test, won’t restart.	Separate the vehicle and key. Wait 20+ minutes. Attempt to restart.	Test normally. BAR-OIS will not request Cal ID or CVN. Possible keyless ignition related issue. The vehicle will recover by just letting it sit for 20+ minutes with the wireless key fob out of range of the vehicle.
Chevrolet	1998-2005	DIESEL C/K2500 & C/K3500 (including Silverado and Suburban), G30, G3500 (including Sport Van, Express Cut-Away & Cargo), P30	Federal diesel vehicle over 8,500 GVWR is not OBD-II certified.	Federal diesel vehicles over 8,500 GVWR were not built to comply with OBD-II or Fed OBD standards.	Test normally. BAR-OIS will ignore incomplete continuous monitors. If the vehicle fails to communicate, use the result of the bulb check for the overall result of the OBD Test if the analyzer offers this option.
Chevrolet	1999-2005	3500 W35042 (box truck) [GVWR 10,001 – 14,000] (diesel) [Federal certified]	Vehicle is not equipped with OBD II.	OBD not installed in federals during these years.	OIS programmed to skip the OBD functional test.
Chevrolet	2000-2002	S-10 (2WD), 2.2L I-4 (E85)	Monitors won’t set on certain flex fuel models, VINs listed below. YGMXT02.2121 YGMXT02.2122 1GMXT02.2122 2GMXT02.2122 YGMXT02.2121 YGMXT02.2122 (VIN 8th digit: 5)	System monitors disabled for operation > E15 blends: O2 Sensor Heater, Secondary Air, Catalyst. System monitors disabled for operation > E10 blends: Evaporative leak check. Desensitized O2 Senor monitor implemented; only reports faults during operation E15 blends.	OIS ignores all 11 readiness monitors.
Chevrolet	2000-2005	Suburban, Silverado, Express, Avalanche (gasoline) [Federal certified]	Message appears during OIS OBD II test stating, “Unable to confirm this Vehicle’s OBD II requirements. Does this vehicle have OBD II?”	Federally certified vehicle may not be certified to OBD II standards.	Check under-hood emission label to determine OBD certification status. Enter correct result into OIS and follow OIS prompts. OIS may state a BAR-97 test is required on vehicles without OBDII.
Chevrolet	2001	Silverado / Tahoe C/K 1500	Failure to set secondary air system monitor.	Possible air injection problem (check valve(s), vacuum line, pump, air passages).	Diagnose. Repair and retest.
Chevrolet	2002	Silverado C/K 2500HD (diesel)	Failure to set EGR monitor.	Difficult drive cycle.	OIS reprogrammed 10/13/2016 to allow monitor to be incomplete.
Chevrolet	2001-2002	Cavalier CNG First VIN digit “3” (built in Mexico)	Failure to set CAT monitor.	Vehicle design anomaly.	OIS reprogrammed 02/11/2015 to allow any one monitor to be incomplete.
Chevrolet	2019	Express 2.8L (diesel) [California certified]	Exhaust Gas Sensor monitor will not complete. A Particulate Matter sensor fault may not set DTC or illuminate MIL.	The Engine Control Module (ECM) may not properly handle diagnostic information for the exhaust Particulate Matter (PM) sensor. Dealers are to reprogram the ECM per Emission Recall N232408230.	Vehicle requires reflash. Perform recall then retest.
Chrysler	1999-2000	Town & Country with 3.0L engine built after 12/1/1998	EGR Monitor will not complete at high altitude.	Reflash available. Confirm all systems functioning. Erase and reprogram PCM per TSB 18-03-00.	Vehicle requires reflash. Repair per TSB, run monitors then retest.
Chrysler	2000	Town and Country 3.3L V-6 (E-85)	Readiness monitors will not set on certain flex fuel models, VINs listed below. WCRXT03.32BP (VIN 8th digit: G)	All monitors disabled for operation >E30 and ethanol fuel content learning.	OIS ignores all 11 readiness monitors.
Chrysler	2003	PT Cruiser 2.4 liter DOHC 16v turbocharged (sales code EDV) with 5- spd manual G288 trans (sales code DDD)	Failure to set catalyst monitor.	PCM software error. Dealer must reprogram PCM. Emissions warranty extended to lifetime for this issue. Diagnose and repair per TSB #18-112-16. Possible repair payment reimbursement, see warranty D-16-26.	Vehicle requires reflash. Repair per TSB and retest.
Chrysler	2010 built prior to 2/20/2010	300, Charger, Challenger 3.5L (5 speed automatic transmission)	Fail for monitor readiness, Or MIL illumination: P0456, P0452, P1115.	Reflash available. See Chrysler TSB #18-008-10	Vehicle requires reflash. Repair per TSB and retest.
Dodge	1998-2002	Ram Truck 5.9L (Cummins diesel) [California certified]	Some continuous monitors will not complete.	Vehicle design anomaly.	Test normally. BAR-OIS allows one incomplete continuous monitor.
Dodge	1998-2006	Ram 2500, Ram 3500 (diesel) [Federal certified]	Federal diesel vehicle over 8,500 GVWR is not OBD-II certified.	Federal diesel vehicles over 8,500 GVWR were not built to comply with OBD-II or Fed OBD standards.	Test normally. BAR-OIS will ignore incomplete continuous monitors. If the vehicle fails to communicate, use the result of the bulb check for the overall result of the OBD Test if the analyzer offers this option.
Dodge	1999-2000	Caravan with 3.0L engine built after 12/1/1998	EGR Monitor will not complete at high altitude.	Reflash available. Confirm all systems functioning. Erase and reprogram PCM per TSB 18-03-00.	Vehicle requires reflash. Repair per TSB, run monitors then retest.
Dodge	2003	Dakota, Durango and Ram Trucks with 4.7L engine [California or 50 state certified]	Catalyst monitor readiness status shows as not supported.	Broken vehicle, repair per TSB #18-032-10 with lifetime warranty.	Test normally. OIS ignores unsupported monitors.
Dodge	2003	Ram Truck 5.9L (Cummins diesel) [California certified]	MIL light is commanded on, but check engine light is not illuminated and no DTCs are stored.	Vehicle design anomaly Recall campaign #K01 for ECM reflash applies to California certified vehicles only.	Test normally. OIS ignores MIL Command if no DTCs are present on this vehicle Advise motorist of Recall Campaign #K01 if the vehicle is California certified.
Dodge	2003-2004	25004X2 and Sprinter 35004X2 (diesel) [2003 Federal certified] [2004 Federal certified]	Federal diesel vehicle over 8,500 GVWR is not OBD-II certified.	Federal diesel vehicles over 8,500 GVWR were not built to comply with OBD-II or Fed OBD standards.	Test normally. BAR-OIS will ignore incomplete continuous monitors. If the vehicle fails to communicate, use the result of the bulb check for the overall result of the OBD Test if the analyzer offers this option.
Dodge	2004-2005 built after 12/7/2003	Ram Truck 5.9L (Cummins diesel) [California certified]	Comprehensive component monitor will not complete.	Vehicle design anomaly Re-flash available per TSB #18-030-10 with lifetime warranty per TSB #18-003-11.	Test normally. OIS allows one incomplete readiness monitor. Advise motorist of fix with lifetime warranty per TSB #18-003-11.
Dodge	2004-2006	2500 3500 Sprinter (diesel)	EGR/V