DTCs, or Diagnostic Trouble Codes, are instrumental in pinpointing problems within Variable Geometry Turbochargers (VGTs) by offering specific information about the nature and location of the malfunction, which is why MERCEDES-DIAGNOSTIC-TOOL.EDU.VN provides in-depth resources for interpreting these codes accurately. Utilizing these codes effectively can help prevent costly repairs and downtime, leading to increased efficiency and performance. Proper interpretation of DTCs, combined with tools like scan tools and multimeters, ensures accurate diagnostics, reducing unnecessary replacements and optimizing repair strategies.
Contents
- 1. Understanding Variable Geometry Turbochargers (VGTs)
- 1.1 How VGTs Work
- 1.2 Components of a VGT System
- 1.3 Benefits of Using VGTs
- 2. The Role of Diagnostic Trouble Codes (DTCs) in VGT Diagnosis
- 2.1 What are DTCs?
- 2.2 How DTCs are Generated
- 2.3 Importance of Accurate DTC Interpretation
- 3. Common DTCs Related to VGT Systems
1. Understanding Variable Geometry Turbochargers (VGTs)
Variable Geometry Turbochargers (VGTs) are advanced turbochargers designed to optimize airflow according to engine conditions. By adjusting the airflow based on engine RPM and load, VGTs ensure peak performance across various driving scenarios. VGTs typically use electronically controlled actuators to move vanes or a sliding sleeve within the turbocharger, modifying exhaust gas flow to the turbine wheel. This adjustment enhances both low-end torque and high-end power, making VGTs a crucial component in modern engines.
1.1 How VGTs Work
VGTs adjust the angle of the vanes to optimize airflow. At low engine speeds, the vanes narrow the passage, increasing exhaust gas velocity to spin the turbine faster. At higher speeds, the vanes open wider to accommodate the increased exhaust flow. This dynamic adjustment allows the turbocharger to deliver optimal boost across the engine’s operating range.
1.2 Components of a VGT System
A typical VGT system consists of several key components:
- Turbocharger Housing: Contains the turbine and compressor wheels.
- Adjustable Vanes or Sliding Nozzle: Controls the airflow onto the turbine wheel.
- Actuator: Electronically or pneumatically controls the position of the vanes.
- Electronic Control Module (ECM): Monitors engine parameters and adjusts the actuator accordingly.
- Sensors: Provide feedback to the ECM about boost pressure, engine speed, and other relevant data.
1.3 Benefits of Using VGTs
VGTs offer several advantages over traditional turbochargers:
- Improved Low-End Torque: VGTs enhance throttle response at low RPMs by increasing exhaust gas velocity.
- Enhanced High-End Power: At high RPMs, VGTs ensure sufficient airflow to maintain boost pressure and power output.
- Reduced Turbo Lag: The ability to quickly adjust airflow minimizes turbo lag, providing a more responsive driving experience.
- Better Fuel Efficiency: Optimizing airflow across the engine’s operating range can improve fuel economy.
- Lower Emissions: Efficient combustion helps reduce emissions, contributing to environmental compliance.
2. The Role of Diagnostic Trouble Codes (DTCs) in VGT Diagnosis
Diagnostic Trouble Codes (DTCs) are essential for diagnosing issues in VGT systems. When a VGT system malfunctions, the ECM detects the problem and stores a corresponding DTC. These codes provide valuable information about the nature and location of the fault, helping technicians quickly identify and resolve the issue. At MERCEDES-DIAGNOSTIC-TOOL.EDU.VN, we emphasize the importance of accurate DTC interpretation to ensure efficient and effective repairs.
2.1 What are DTCs?
DTCs are alphanumeric codes used to identify specific faults within a vehicle’s electronic systems. They are generated by the ECM when it detects a malfunction, providing a standardized way to communicate diagnostic information. These codes can be accessed using a scan tool, which retrieves the stored DTCs from the ECM.
2.2 How DTCs are Generated
When a sensor detects an abnormal condition or a component fails to perform as expected, the ECM registers a DTC. For example, if the boost pressure sensor detects excessively high or low pressure, the ECM will store a DTC related to boost pressure. Similarly, if the VGT actuator fails to respond to commands from the ECM, a DTC related to the actuator circuit will be generated.
2.3 Importance of Accurate DTC Interpretation
Accurate interpretation of DTCs is crucial for effective diagnosis. Each DTC corresponds to a specific fault, and understanding the meaning of the code helps technicians focus their troubleshooting efforts. Misinterpreting a DTC can lead to unnecessary repairs and wasted time. Resources like MERCEDES-DIAGNOSTIC-TOOL.EDU.VN provide detailed information about DTC definitions and troubleshooting procedures to ensure accurate diagnosis.
3. Common DTCs Related to VGT Systems
Several DTCs are commonly associated with VGT system malfunctions. Understanding these codes and their potential causes is essential for efficient troubleshooting. The following table lists some of the most common VGT-related DTCs and their possible causes:
| DTC Code | Description | Possible Causes |
|---|---|---|
| P0045 | Turbocharger Boost Control Solenoid Circuit Open | Open or shorted solenoid circuit, faulty solenoid, wiring issues, ECM failure |
| P0046 | Turbocharger Boost Control Solenoid Circuit Range/Performance | Faulty solenoid, vacuum leaks, restricted vacuum lines, wiring issues, ECM failure |
| P0047 | Turbocharger Boost Control Solenoid Circuit Low | Shorted solenoid circuit, faulty solenoid, wiring issues, ECM failure |
| P0048 | Turbocharger Boost Control Solenoid Circuit High | Open solenoid circuit, faulty solenoid, wiring issues, ECM failure |
| P0234 | Turbocharger Overboost Condition | Faulty boost pressure sensor, stuck VGT vanes, wastegate malfunction, excessive exhaust gas flow |
| P0299 | Turbocharger Underboost Condition | Vacuum leaks, faulty boost pressure sensor, stuck VGT vanes, insufficient exhaust gas flow, intake air leaks |
| P2563 | Turbocharger Boost Control Position Sensor Circuit Range/Performance | Faulty position sensor, wiring issues, mechanical issues with the VGT actuator, ECM failure |
| P2564 | Turbocharger Boost Control Position Sensor Circuit Low | Shorted position sensor circuit, faulty position sensor, wiring issues, ECM failure |
| P2565 | Turbocharger Boost Control Position Sensor Circuit High | Open position sensor circuit, faulty position sensor, wiring issues, ECM failure |
| P00AF | Turbocharger Turbine Control Circuit Open | Open or shorted turbine control circuit, faulty control solenoid, wiring issues, ECM failure |
| P00B0 | Turbocharger Turbine Control Circuit Range/Performance | Faulty control solenoid, vacuum leaks, restricted vacuum lines, wiring issues, ECM failure |
| P00B1 | Turbocharger Turbine Control Circuit Low | Shorted turbine control circuit, faulty control solenoid, wiring issues, ECM failure |
| P00B2 | Turbocharger Turbine Control Circuit High | Open turbine control circuit, faulty control solenoid, wiring issues, ECM failure |
| P004D | Turbocharger Boost Control ‘A’ Circuit High | Faulty boost control actuator, wiring issues, ECM failure |
| P004E | Turbocharger Boost Control ‘A’ Circuit Intermittent/Erratic | Intermittent connection issues, faulty boost control actuator, ECM issues |
| P004F | Turbocharger Boost Control ‘B’ Circuit Range/Performance | Faulty boost control actuator, vacuum leaks, wiring issues, ECM failure |
| P0050 | Turbocharger Boost Control ‘B’ Circuit Low | Shorted boost control circuit, faulty boost control actuator, wiring issues, ECM failure |
| P0051 | Turbocharger Boost Control ‘B’ Circuit High | Open boost control circuit, faulty boost control actuator, wiring issues, ECM failure |
| P006A | Manifold Absolute Pressure – Turbocharger Boost Correlation | Faulty MAP sensor, faulty boost pressure sensor, vacuum leaks, ECM failure |
| P0105 | Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction | Faulty MAP sensor, wiring issues, vacuum leaks, ECM failure |
| P0235 | Turbocharger Boost Sensor A Circuit Malfunction | Faulty boost pressure sensor, wiring issues, vacuum leaks, ECM failure |
| P0236 | Turbocharger Boost Sensor A Circuit Range/Performance | Faulty boost pressure sensor, wiring issues, vacuum leaks, ECM failure |
| P0237 | Turbocharger Boost Sensor A Circuit Low | Shorted boost pressure sensor circuit, faulty sensor, wiring issues, ECM failure |
| P0238 | Turbocharger Boost Sensor A Circuit High | Open boost pressure sensor circuit, faulty sensor, wiring issues, ECM failure |
| P0243 | Turbocharger Wastegate Solenoid A Malfunction | Faulty wastegate solenoid, wiring issues, vacuum leaks, ECM failure |
| P0244 | Turbocharger Wastegate Solenoid A Range/Performance | Faulty wastegate solenoid, vacuum leaks, wiring issues, ECM failure |
| P0245 | Turbocharger Wastegate Solenoid A Low | Shorted wastegate solenoid circuit, faulty solenoid, wiring issues, ECM failure |
| P0246 | Turbocharger Wastegate Solenoid A High | Open wastegate solenoid circuit, faulty solenoid, wiring issues, ECM failure |
| P0257 | Turbocharger Speed Sensor Circuit Malfunction | Faulty turbocharger speed sensor, wiring issues, ECM failure |
| P0258 | Turbocharger Speed Sensor Circuit Range/Performance | Faulty turbocharger speed sensor, wiring issues, ECM failure |
| P0259 | Turbocharger Speed Sensor Circuit Intermittent | Intermittent connection issues, faulty turbocharger speed sensor, ECM issues |
| P026A | Charge Air Cooler Efficiency Below Threshold | Faulty charge air cooler, leaks in the charge air system, faulty sensors |
| P0297 | Vehicle Overspeed Condition | Vehicle speed exceeding the maximum limit, faulty speed sensor, ECM issue |
| P0340 | Camshaft Position Sensor ‘A’ Circuit Malfunction | Faulty camshaft position sensor, wiring issues, timing issues |
| P0341 | Camshaft Position Sensor ‘A’ Circuit Range/Performance | Faulty camshaft position sensor, timing issues, ECM issues |
| P0401 | Exhaust Gas Recirculation Flow Insufficient Detected | Faulty EGR valve, vacuum leaks, restricted EGR passages |
| P0402 | Exhaust Gas Recirculation Flow Excessive Detected | Faulty EGR valve, vacuum leaks, restricted EGR passages |
| P0403 | Exhaust Gas Recirculation Circuit Malfunction | Faulty EGR valve, wiring issues, vacuum leaks |
| P0404 | Exhaust Gas Recirculation Circuit Range/Performance | Faulty EGR valve, vacuum leaks, wiring issues |
| P0405 | Exhaust Gas Recirculation Sensor ‘A’ Circuit Low | Faulty EGR sensor, wiring issues, ECM issues |
| P0406 | Exhaust Gas Recirculation Sensor ‘A’ Circuit High | Faulty EGR sensor, wiring issues, ECM issues |
| P0407 | Exhaust Gas Recirculation Sensor ‘B’ Circuit Low | Faulty EGR sensor, wiring issues, ECM issues |
| P0408 | Exhaust Gas Recirculation Sensor ‘B’ Circuit High | Faulty EGR sensor, wiring issues, ECM issues |
| P0420 | Catalyst System Efficiency Below Threshold (Bank 1) | Faulty catalytic converter, exhaust leaks, faulty oxygen sensors |
| P0421 | Warm Up Catalyst Efficiency Below Threshold (Bank 1) | Faulty catalytic converter, exhaust leaks, faulty oxygen sensors |
| P0440 | Evaporative Emission Control System Malfunction | Leaks in the evaporative emission system, faulty components |
| P0441 | Evaporative Emission Control System Incorrect Purge Flow | Faulty purge valve, vacuum leaks, restricted lines |
| P0442 | Evaporative Emission Control System Leak Detected (Small Leak) | Leaks in the evaporative emission system, faulty components |
| P0446 | Evaporative Emission Control System Vent Control Circuit Malfunction | Faulty vent valve, wiring issues, ECM issues |
| P0455 | Evaporative Emission Control System Leak Detected (Gross Leak) | Leaks in the evaporative emission system, faulty components |
| P0456 | Evaporative Emission Control System Leak Detected (Very Small Leak) | Leaks in the evaporative emission system, faulty components |
| P0457 | Evaporative Emission Control System Leak Detected (Fuel Cap Loose/Off) | Loose or missing fuel cap, leaks in the evaporative emission system |
| P0461 | Fuel Level Sensor ‘A’ Circuit Range/Performance | Faulty fuel level sensor, wiring issues, ECM issues |
| P0462 | Fuel Level Sensor ‘A’ Circuit Low | Faulty fuel level sensor, wiring issues, ECM issues |
| P0463 | Fuel Level Sensor ‘A’ Circuit High | Faulty fuel level sensor, wiring issues, ECM issues |
| P0480 | Cooling Fan 1 Control Circuit Malfunction | Faulty cooling fan, wiring issues, relay issues |
| P0481 | Cooling Fan 2 Control Circuit Malfunction | Faulty cooling fan, wiring issues, relay issues |
| P0500 | Vehicle Speed Sensor ‘A’ Malfunction | Faulty speed sensor, wiring issues, ECM issues |
| P0501 | Vehicle Speed Sensor ‘A’ Range/Performance | Faulty speed sensor, wiring issues, ECM issues |
| P0505 | Idle Air Control System Malfunction | Faulty idle air control valve, vacuum leaks, wiring issues |
| P0506 | Idle Air Control System RPM Lower Than Expected | Vacuum leaks, faulty idle air control valve, carbon buildup |
| P0507 | Idle Air Control System RPM Higher Than Expected | Vacuum leaks, faulty idle air control valve, throttle body issues |
| P0530 | A/C Refrigerant Pressure Sensor ‘A’ Circuit Malfunction | Faulty A/C pressure sensor, wiring issues, ECM issues |
| P0531 | A/C Refrigerant Pressure Sensor ‘A’ Circuit Range/Performance | Faulty A/C pressure sensor, wiring issues, ECM issues |
| P0532 | A/C Refrigerant Pressure Sensor ‘A’ Circuit Low | Faulty A/C pressure sensor, wiring issues, ECM issues |
| P0533 | A/C Refrigerant Pressure Sensor ‘A’ Circuit High | Faulty A/C pressure sensor, wiring issues, ECM issues |
| P0560 | System Voltage Malfunction | Faulty alternator, battery issues, wiring problems |
| P0562 | System Voltage Low | Faulty alternator, battery issues, wiring problems |
| P0563 | System Voltage High | Faulty alternator, battery issues, wiring problems |
| P0600 | Serial Communication Link Malfunction | Wiring issues, ECM issues, communication problems between modules |
| P0601 | Internal Control Module Memory Check Sum Error | ECM issues, internal memory errors |
| P0602 | Control Module Programming Error | ECM issues, programming errors |
| P0603 | Internal Control Module Keep Alive Memory (KAM) Error | ECM issues, KAM errors |
| P0604 | Internal Control Module Random Access Memory (RAM) Error | ECM issues, RAM errors |
| P0605 | Internal Control Module Read Only Memory (ROM) Error | ECM issues, ROM errors |
| P0606 | ECM/PCM Processor Malfunction | ECM issues, processor errors |
| P0607 | Control Module Performance | ECM issues, performance problems |
| P060A | Internal Control Module Monitoring Processor Performance | ECM issues, monitoring processor performance problems |
| P060B | Internal Control Module A/D Processing Performance | ECM issues, A/D processing performance problems |
| P060C | Internal Control Module Main Processor Performance | ECM issues, main processor performance problems |
| P0610 | Control Module Vehicle Options Error | ECM issues, vehicle options errors |
| P0611 | Fuel Injector Control Module Performance | Faulty fuel injector control module, wiring issues |
| P0612 | Fuel Injector Control Module Relay Control Circuit | Faulty fuel injector control module, relay issues, wiring problems |
| P0613 | TCM Processor Malfunction | Transmission control module issues, processor errors |
| P0614 | ECM/TCM Incompatible | Incompatible ECM and TCM, programming issues |
| P0615 | Starter Relay Control Circuit Malfunction | Faulty starter relay, wiring issues |
| P0616 | Starter Relay Control Circuit Low | Faulty starter relay, wiring issues |
| P0617 | Starter Relay Control Circuit High | Faulty starter relay, wiring issues |
| P0620 | Generator Control Circuit Malfunction | Faulty generator, wiring issues |
| P0621 | Generator Lamp ‘L’ Control Circuit Malfunction | Faulty generator, wiring issues |
| P0622 | Generator Field ‘F’ Control Circuit Malfunction | Faulty generator, wiring issues |
| P0625 | Generator Field ‘F’ Control Circuit Low | Faulty generator, wiring issues |
| P0626 | Generator Field ‘F’ Control Circuit High | Faulty generator, wiring issues |
| P0627 | Fuel Pump ‘A’ Control Circuit Malfunction | Faulty fuel pump, wiring issues |
| P0628 | Fuel Pump ‘A’ Control Circuit Low | Faulty fuel pump, wiring issues |
| P0629 | Fuel Pump ‘A’ Control Circuit High | Faulty fuel pump, wiring issues |
| P0630 | VIN Not Programmed or Incompatible – ECM/PCM | ECM issues, programming errors, VIN mismatch |
| P0631 | VIN Not Programmed or Incompatible – TCM | TCM issues, programming errors, VIN mismatch |
| P0632 | Odometer Not Programmed – ECM/PCM | ECM issues, programming errors, odometer mismatch |
| P0633 | Immobilizer Key Not Programmed – ECM/PCM | Immobilizer issues, key programming errors |
| P0635 | Power Steering Control Circuit Malfunction | Faulty power steering control module, wiring issues |
| P0636 | Power Steering Control Circuit Low | Faulty power steering control module, wiring issues |
| P0637 | Power Steering Control Circuit High | Faulty power steering control module, wiring issues |
| P0638 | Throttle Actuator Control Range/Performance (Bank 1) | Faulty throttle actuator, wiring issues, throttle body issues |
| P0639 | Throttle Actuator Control Range/Performance (Bank 2) | Faulty throttle actuator, wiring issues, throttle body issues |
| P0641 | Sensor Reference Voltage ‘A’ Circuit Open | Wiring issues, ECM issues |
| P0642 | Sensor Reference Voltage ‘A’ Circuit Low | Wiring issues, ECM issues |
| P0643 | Sensor Reference Voltage ‘A’ Circuit High | Wiring issues, ECM issues |
| P0645 | A/C Clutch Relay Control Circuit Malfunction | Faulty A/C clutch relay, wiring issues |
| P0646 | A/C Clutch Relay Control Circuit Low | Faulty A/C clutch relay, wiring issues |
| P0647 | A/C Clutch Relay Control Circuit High | Faulty A/C clutch relay, wiring issues |
| P0648 | Immobilizer Lamp Control Circuit Malfunction | Immobilizer issues, wiring problems |
| P0649 | Speed Control Lamp Control Circuit Malfunction | Cruise control issues, wiring problems |
| P0650 | Malfunction Indicator Lamp (MIL) Control Circuit Malfunction | Wiring issues, ECM issues, bulb issues |
| P0651 | Sensor Reference Voltage ‘B’ Circuit Open | Wiring issues, ECM issues |
| P0652 | Sensor Reference Voltage ‘B’ Circuit Low | Wiring issues, ECM issues |
| P0653 | Sensor Reference Voltage ‘B’ Circuit High | Wiring issues, ECM issues |
| P0654 | Engine RPM Output Circuit Malfunction | Wiring issues, ECM issues |
| P0655 | Hot Lamp Control Circuit Malfunction | Overheating issues, wiring problems |
| P0656 | Fuel Level Output Circuit Malfunction | Fuel level sensor issues, wiring problems |
| P0657 | Actuator Supply Voltage ‘A’ Circuit Open | Wiring issues, ECM issues |
| P0658 | Actuator Supply Voltage ‘A’ Circuit Low | Wiring issues, ECM issues |
| P0659 | Actuator Supply Voltage ‘A’ Circuit High | Wiring issues, ECM issues |
| P0660 | Intake Manifold Tuning Valve Control Circuit Open (Bank 1) | Wiring issues, ECM issues, valve issues |
| P0661 | Intake Manifold Tuning Valve Control Circuit Low (Bank 1) | Wiring issues, ECM issues, valve issues |
| P0662 | Intake Manifold Tuning Valve Control Circuit High (Bank 1) | Wiring issues, ECM issues, valve issues |
| P0663 | Intake Manifold Tuning Valve Control Circuit Open (Bank 2) | Wiring issues, ECM issues, valve issues |
| P0664 | Intake Manifold Tuning Valve Control Circuit Low (Bank 2) | Wiring issues, ECM issues, valve issues |
| P0665 | Intake Manifold Tuning Valve Control Circuit High (Bank 2) | Wiring issues, ECM issues, valve issues |
| P0670 | Glow Plug Control Module Control Circuit Malfunction | Glow plug issues, wiring problems, module issues |
| P0671 | Cylinder 1 Glow Plug Circuit Malfunction | Glow plug issues, wiring problems |
| P0672 | Cylinder 2 Glow Plug Circuit Malfunction | Glow plug issues, wiring problems |
| P0673 | Cylinder 3 Glow Plug Circuit Malfunction | Glow plug issues, wiring problems |
| P0674 | Cylinder 4 Glow Plug Circuit Malfunction | Glow plug issues, wiring problems |
| P0675 | Cylinder 5 Glow Plug Circuit Malfunction | Glow plug issues, wiring problems |
| P0676 | Cylinder 6 Glow Plug Circuit Malfunction | Glow plug issues, wiring problems |
| P0677 | Cylinder 7 Glow Plug Circuit Malfunction | Glow plug issues, wiring problems |
| P0678 | Cylinder 8 Glow Plug Circuit Malfunction | Glow plug issues, wiring problems |
| P0683 | Glow Plug Control Module to PCM Communication Circuit Malfunction | Communication problems between the glow plug module and PCM |
| P0684 | Glow Plug Control Module to PCM Communication Circuit Range/Performance | Communication problems between the glow plug module and PCM |
| P0691 | Fan 1 Control Circuit Low | Faulty fan, wiring issues |
| P0692 | Fan 1 Control Circuit High | Faulty fan, wiring issues |
| P0693 | Fan 2 Control Circuit Low | Faulty fan, wiring issues |
| P0694 | Fan 2 Control Circuit High | Faulty fan, wiring issues |
| P0700 | Transmission Control System Malfunction | Transmission issues, wiring problems, ECM issues |
| P0701 | Transmission Range/Performance | Transmission issues, wiring problems, ECM issues |
| P0702 | Transmission Control System Electrical | Transmission issues, wiring problems, ECM issues |
| P0703 | Torque Converter/Brake Switch B Circuit Malfunction | Torque converter issues, brake switch problems, wiring problems |
| P0704 | Clutch Switch Input Circuit Malfunction | Clutch switch problems, wiring problems |
| P0705 | Transmission Range Sensor Circuit Malfunction (PRNDL Input) | Transmission sensor issues, wiring problems |
| P0706 | Transmission Range Sensor Circuit Range/Performance | Transmission sensor issues, wiring problems |
| P0707 | Transmission Range Sensor Circuit Low | Transmission sensor issues, wiring problems |
| P0708 | Transmission Range Sensor Circuit High | Transmission sensor issues, wiring problems |
| P0709 | Transmission Range Sensor Circuit Intermittent | Intermittent issues with the transmission sensor, wiring problems |
| P0710 | Transmission Fluid Temperature Sensor Circuit Malfunction | Transmission fluid temperature sensor issues, wiring problems |
| P0711 | Transmission Fluid Temperature Sensor Circuit Range/Performance | Transmission fluid temperature sensor issues, wiring problems |
| P0712 | Transmission Fluid Temperature Sensor Circuit Low | Transmission fluid temperature sensor issues, wiring problems |
| P0713 | Transmission Fluid Temperature Sensor Circuit High | Transmission fluid temperature sensor issues, wiring problems |
| P0714 | Transmission Fluid Temperature Sensor Circuit Intermittent | Intermittent issues with the transmission fluid temperature sensor, wiring problems |
| P0715 | Input/Turbine Speed Sensor Circuit Malfunction | Input/turbine speed sensor issues, wiring problems |
| P0716 | Input/Turbine Speed Sensor Circuit Range/Performance | Input/turbine speed sensor issues, wiring problems |
| P0717 | Input/Turbine Speed Sensor Circuit No Signal | Input/turbine speed sensor issues, wiring problems |
| P0718 | Input/Turbine Speed Sensor Circuit Intermittent | Intermittent issues with the input/turbine speed sensor, wiring problems |
| P0719 | Torque Converter/Brake Switch B Circuit Low | Torque converter issues, brake switch problems, wiring problems |
| P0720 | Output Speed Sensor Circuit Malfunction | Output speed sensor issues, wiring problems |
| P0721 | Output Speed Sensor Circuit Range/Performance | Output speed sensor issues, wiring problems |
| P0722 | Output Speed Sensor Circuit No Signal | Output speed sensor issues, wiring problems |
| P0723 | Output Speed Sensor Circuit Intermittent | Intermittent issues with the output speed sensor, wiring problems |
| P0724 | Torque Converter/Brake Switch B Circuit High | Torque converter issues, brake switch problems, wiring problems |
| P0725 | Engine Speed Input Circuit Malfunction | Engine speed sensor issues, wiring problems |
| P0726 | Engine Speed Input Circuit Range/Performance | Engine speed sensor issues, wiring problems |
| P0727 | Engine Speed Input Circuit No Signal | Engine speed sensor issues, wiring problems |
| P0728 | Engine Speed Input Circuit Intermittent | Intermittent issues with the engine speed sensor, wiring problems |
| P0730 | Incorrect Gear Ratio | Transmission issues, sensor problems, gear problems |
| P0731 | Gear 1 Incorrect Ratio | Transmission issues, sensor problems, gear problems |
| P0732 | Gear 2 Incorrect Ratio | Transmission issues, sensor problems, gear problems |
| P0733 | Gear 3 Incorrect Ratio | Transmission issues, sensor problems, gear problems |
| P0734 | Gear 4 Incorrect Ratio | Transmission issues, sensor problems, gear problems |
| P0735 | Gear 5 Incorrect Ratio | Transmission issues, sensor problems, gear problems |
| P0736 | Reverse Incorrect Ratio | Transmission issues, sensor problems, gear problems |
| P0740 | Torque Converter Clutch Circuit Malfunction | Torque converter issues, clutch problems, wiring problems |
| P0741 | Torque Converter Clutch Circuit Performance or Stuck Off | Torque converter issues, clutch problems, wiring problems |
| P0742 | Torque Converter Clutch Circuit Stuck On | Torque converter issues, clutch problems, wiring problems |
| P0743 | Torque Converter Clutch Circuit Electrical | Torque converter issues, clutch problems, wiring problems |
| P0744 | Torque Converter Clutch Circuit Intermittent | Intermittent issues with the torque converter clutch, wiring problems |
| P0745 | Pressure Control Solenoid ‘A’ Malfunction | Transmission issues, solenoid problems, wiring problems |
| P0746 | Pressure Control Solenoid ‘A’ Performance or Stuck Off | Transmission issues, solenoid problems, wiring problems |
| P0747 | Pressure Control Solenoid ‘A’ Stuck On | Transmission issues, solenoid problems, wiring problems |
| P0748 | Pressure Control Solenoid ‘A’ Electrical | Transmission issues, solenoid problems, wiring problems |
| P0749 | Pressure Control Solenoid ‘A’ Intermittent | Intermittent issues with the pressure control solenoid, wiring problems |
| P0750 | Shift Solenoid ‘A’ Malfunction | Transmission issues, solenoid problems, wiring problems |
| P0751 | Shift Solenoid ‘A’ Performance or Stuck Off | Transmission issues, solenoid problems, wiring problems |
| P0752 | Shift Solenoid ‘A’ Stuck On | Transmission issues, solenoid problems, wiring problems |
| P0753 | Shift Solenoid ‘A’ Electrical | Transmission issues, solenoid problems, wiring problems |
| P0754 | Shift Solenoid ‘A’ Intermittent | Intermittent issues with the shift solenoid, wiring problems |
| P0755 | Shift Solenoid ‘B’ Malfunction | Transmission issues, solenoid problems, wiring problems |
| P0756 | Shift Solenoid ‘B’ Performance or Stuck Off | Transmission issues, solenoid problems, wiring problems |
| P0757 | Shift Solenoid ‘B’ Stuck On | Transmission issues, solenoid problems, wiring problems |
| P0758 | Shift Solenoid ‘B’ Electrical | Transmission issues, solenoid problems, wiring problems |
| P0759 | Shift Solenoid ‘B’ Intermittent | Intermittent issues with the shift solenoid, wiring problems |
| P0760 | Shift Solenoid ‘C’ Malfunction | Transmission issues, solenoid problems, wiring problems |
| P0761 | Shift Solenoid ‘C’ Performance or Stuck Off | Transmission issues, solenoid problems, wiring problems |
| P0762 | Shift Solenoid ‘C’ Stuck On | Transmission issues, solenoid problems, wiring problems |
| P0763 | Shift Solenoid ‘C’ Electrical | Transmission issues, solenoid problems, wiring problems |
