P0667 Fault Code

PCM / ECM / TCM Internal Temperature Sensor Range/Performance

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0667 fault code is triggered when the Powertrain Control Module (PCM), Engine Control Module (ECM), or Transmission Control Module (TCM) detects an issue with the internal temperature sensor. This sensor is crucial for monitoring and regulating the temperature within the engine or transmission system. When the performance or range of this sensor is outside of the expected parameters, it can lead to inaccurate readings and potential operational issues in the vehicle.

What are the symptoms of the P0667 code?

• Engine overheating warning light or message
• Poor engine performance or efficiency issues
• Unusual shifting patterns in automatic transmissions
• Inconsistent readings in temperature gauges
• Potential stalling or rough idling due to incorrect temperature readings

What causes the P0667 code?

• Malfunctioning internal temperature sensor
• Damaged wiring or connectors related to the sensor
• Corrupted signals or data from the PCM/ECM/TCM
• Software glitches within the control modules
• Exposure to extreme temperatures or environmental factors affecting sensor performance

How to fix P0667?

• Inspect and test the internal temperature sensor for functionality
• Check and repair any damaged wiring or connectors
• Reflash or update the PCM/ECM/TCM software if necessary
• Replace the temperature sensor if it is found to be defective
• Clear the fault code and test drive the vehicle to ensure the problem is resolved