P0669

DTC P0669, sometimes indicated as P066900 is an OBD diagnostic trouble code indicating a generic fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the onboard computer system or ancillary outputs causing pcm/ecm/tcm internal temperature sensor circuit high.

This code is set when the PCM detects that the internal temperature sensor has exceeded the allowable temperature range. There are several possible causes for this code, including a defective internal temperature sensor, a wiring issue, or a problem with the PCM.
If this code is caused by a defective internal temperature sensor, the sensor will need to be replaced. If the wiring is at fault, the issue will need to be corrected. If the PCM is at fault, it will need to be replaced.

• P0669: PCM/ECM/TCM Internal Temperature Sensor Circuit High
• P0669: PCM/ECM/TCM Internal Temperature Sensor "A" Circuit High
• P0669: PCM/ECM/TCM Internal Temp. Sensor Circuit High
• P0669: ECM/PCM/TCM internal temperature sensor – circuit high
• P0669 00: ECM/PCM/TCM internal temperature sensor - circuit high