P0666 OBD II Trouble Code PCM/ECM/TCM Internal Temperature Sensor Circuit

How to easily troubleshoot and repair, and causes of a P0666 trouble code which indicates a detected internal temp sensor circuit fault in a PCM, ECM, or TCM module.

Symptoms of P0666 OBD II Trouble Code

Common Causes of P0666 OBD II Trouble Code

Severity of P0666 OBD II Trouble Code

Never miss out: Get notified about P0666.