P007E Charge Air Cooler Temperature Sensor Circuit Intermittent/Erratic Bank 1

Definition

Common causes

• Faulty charge air cooler temperature sensor
• Damaged wiring or connectors in the sensor circuit
• Poor electrical connections
• Short circuit or open circuit in the sensor circuit
• Faulty engine control module (ECM)
• Corrosion or contamination in the sensor or connectors
• Intermittent signal issues due to vibration or movement
• Temperature sensor calibration issues

Common misdiagnoses

• Faulty Charge Air Cooler Temperature Sensor
• Wiring issues or poor connections
• Faulty Engine Control Module (ECM)
• Incorrectly diagnosed turbocharger issues
• Misinterpreted intake air temperature sensor readings
• Vacuum leaks
• Faulty mass air flow (MAF) sensor
• Issues with the intercooler
• Problems with the exhaust gas recirculation (EGR) system
• Faulty coolant temperature sensor

Troubleshooting steps

1. 1. Check for Additional Codes

   Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are other issues affecting the system

2. 2. Inspect the Charge Air Cooler Temperature Sensor

   Visual Inspection: Check the sensor for any physical damage, corrosion, or loose connections. Ensure that the wiring harness is intact and that there are no frayed wires

3. 3. Connector Check

   Ensure that the electrical connector is clean and securely attached. Look for bent pins or signs of moisture intrusion

4. 4. Test the Charge Air Cooler Temperature Sensor

   Resistance Check: Use a multimeter to measure the resistance of the sensor at various temperatures. Compare the readings to the manufacturer’s specifications

5. 5. Voltage Check

   With the ignition on (engine off), check the voltage at the sensor connector. It should match the expected voltage as per the vehicle’s specifications

6. 6. Inspect the Wiring and Connectors

   Continuity Test: Perform a continuity test on the wiring between the sensor and the Engine Control Module (ECM) to ensure there are no breaks or shorts

7. 7. Ground Check

   Ensure that the sensor has a good ground connection. A poor ground can cause erratic readings

8. 8. Check for Intermittent Issues

   Wiggle Test: While monitoring the sensor readings with a scan tool, gently wiggle the wiring harness and connectors to see if the readings change. This can help identify intermittent connections

9. 9. Temperature Variation

   Monitor the sensor output while the engine is running and the vehicle is at operating temperature. Look for any erratic changes in the readings

10. 10. Inspect Related Components

    Charge Air Cooler: Check the charge air cooler for any blockages or leaks that could affect the temperature readings

11. 11. Turbocharger and Intercooler

    If applicable, inspect the turbocharger and intercooler for proper operation and any signs of damage

12. 12. Check Engine Control Module (ECM)

    If all other components check out, consider the possibility of a faulty ECM. This is less common but can happen. Ensure that the ECM is receiving the correct signals from the sensor

13. 13. Clear Codes and Test Drive

    After performing repairs or adjustments, clear the trouble codes and take the vehicle for a test drive to see if the code returns. Monitor the sensor readings during the drive

14. 14. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the P007E code for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes

15. 15. Seek Professional Help

    If you are unable to resolve the issue after these steps, it may be best to consult a professional mechanic or technician who has experience with your vehicle’s make and model. By following these steps, you should be able to diagnose and potentially fix the issue related to the P007E code. Always refer to the vehicle’s service manual for specific details and specifications