Error code
OBD2 P0669
OBD2P0669
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
PCM/ECM/TCM Internal Temperature Sensor Circuit High.
Severity
moderateCan drive but may experience performance issues or increased emissions.
Summary
P0669 indicates an issue with the internal temperature sensor circuit in the Powertrain Control Module (PCM), Engine Control Module (ECM), or Transmission Control Module (TCM). The problem is that the circuit has a high reading, likely due to a wiring fault.
Common Causes
- Wiring short to positive
- Faulty internal temperature sensor in ECM/PCM/TCM
Fixes
- Replace the faulty internal temperature sensor in the ECM/PCM/TCM.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
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- P0604Internal Control Module Random Access Memory (RAM) Error
- P0605Internal Control Module Read Only Memory (ROM) Error
- P0606ECM/PCM Processor
- P0607Control Module Performance
- P0608Control Module VSS Output 'A'
- P0609Control Module VSS Output 'B'
- P0610Control Module Vehicle Options Error
- P0611Fuel Injector Control Module Performance