Fault code lookup

PowertrainP0669

Serious

Severity: Serious - have it checked soon

Control Module Internal Temperature Sensor A Circuit High

32 brands affected · Generic SAE J2012 description.

Key terms: Control module: a small computer that runs one part of the car · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

The engine computer or one of its output circuits has a fault.

2Common causes

  1. Engine control module fault
  2. Power or ground connection problem
  3. Low battery or charging voltage
  4. Wiring short or open circuit
  5. Software or memory fault

3Can I drive?

Serious · drive with care

If the engine runs normally, drive carefully to a workshop for diagnosis. If it runs badly, stalls, or will not restart, have the car towed.

This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.

4Brand data 32

BrandCodeDescriptionSystem
Ashok Leyland CVP0669Left Rear Fog Light. Short Circuit To Ground BrandPowertrain
BAIC MotorP0669PCM/ECM/TCM Internal Temperature Sensor Circuit High BrandPowertrain
Mercedes-BenzP0669Control Module Internal Temperature Sensor A Circuit High SAEPowertrain
BYDP0669PCM/ECM/TCM Internal Temperature Sensor Circuit High BrandPowertrain
CheryP0669Internal Temperature Sensor: Too High BrandPowertrain
ChryslerP0669PCM/ECM/TCM Internal Temperature Sensor 1 Circuit High BrandPowertrain
DaewooP0669PCM/ECM/TCM Internal Temperature Sensor Circuit High BrandPowertrain
DFFSP0669ECU internal fault: not characterized BrandPowertrain
DFFXP0669PCM/ECM/TCM Internal Temperature Sensor Circuit High BrandPowertrain
DFXKP0669Internal Temperature Sensor: Too High BrandPowertrain
EOBDP0669Litar sensor suhu dalaman modul kawalan 'A' tinggi BrandPowertrain
FiatP0669PCM/ECM/TCM Internal temperature sensor 1 circuit high BrandPowertrain
GeelyP0669Internal Temperature Sensor: Too High BrandPowertrain
GMP0669PCM/ECM/TCM Internal Temperature Sensor Circuit High BrandPowertrain
Great WallP0669ECU temperature sensor signal high BrandPowertrain
HafeiP0669PCM/ECM/TCM Internal Temperature Sensor Circuit High BrandPowertrain
HoldenP0669Control Module Internal Temperature Sensor A Circuit High SAEPowertrain
HondaP0669Control Module Internal Temperature Sensor A Circuit High SAEPowertrain
HyundaiP0669Control Module Internal Temperature Sensor A Circuit High SAEPowertrain
IsuzuP0669Control Module Internal Temperature Sensor A Circuit High SAEPowertrain
Land RoverP0669Control Module Internal Temperature Sensor A Circuit High SAEPowertrain
MaseratiP0669Powertrain control module/Engine Control Module/TCM Internal Temperature Sensor 1 Circuit High BrandPowertrain
MitsubishiP0669Control Module Internal Temperature Sensor A Circuit High SAEPowertrain
OpelP0669PCM/ECM/TCM Internal Temperature Sensor Circuit High BrandPowertrain
PeugeotP0669Control Module Internal Temperature Sensor A Circuit High SAEPowertrain
ProtonP0669Control Module Internal Temperature Sensor A Circuit High SAEPowertrain
SaabP0669PCM/ECM/TCM Internal Temperature Sensor Circuit High BrandPowertrain
MG (SAIC)P0669PCM/ECM/TCM Internal Temperature Sensor Circuit High BrandPowertrain
SprinterP0669Control Module Internal Temperature Sensor A Circuit High SAEPowertrain
SuzukiP0669Control Module Internal Temperature Sensor A Circuit High SAEPowertrain
TataP0669PCM/ECM/TCM Internal Temperature Sensor Circuit High BrandPowertrain
ToyotaP0669ECU internal fault: not characterized BrandPowertrain

Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.

5Extended variant codes 4

These 7-character codes are manufacturer-specific variants of P0669 and may be reported by some scan tools.

BrandCodeDescriptionSystem
Mercedes-BenzP066900The internal temperature sensor of the control unit has a short circuit to positive. BrandPowertrain
SsangYongP066900ECU error: interior temperature sensor signal high BrandPowertrain
Mercedes-BenzP066912The internal temperature sensor of the control unit has a short circuit to positive. There is a short circuit to positive. BrandPowertrain
Mercedes-BenzP066915The internal temperature sensor of the control unit has a short circuit to positive. There is a short circuit to positive or an open circuit. BrandPowertrain

6Related codes

  • P0660 Intake Manifold Tuning Valve Control Circuit/Open (Bank 1)
  • P0661 Intake Manifold Tuning Valve Control Circuit Low (Bank 1)
  • P0662 Intake Manifold Tuning Valve Control Circuit High (Bank 1)
  • P0663 Intake Manifold Tuning Valve Control Circuit/Open (Bank 2)
  • P0664 Intake Manifold Tuning Valve Control Circuit Low (Bank 2)
  • P0665 Intake Manifold Tuning Valve Control Circuit High (Bank 2)
  • P0666 Control Module Internal Temperature Sensor A Circuit
  • P0667 Control Module Internal Temperature Sensor A Range/Performance
  • P0668 Control Module Internal Temperature Sensor A Circuit Low
  • P066A Cylinder 1 Glow Plug Control Circuit Low
  • P066B Cylinder 1 Glow Plug Control Circuit High
  • P066C Cylinder 2 Glow Plug Control Circuit Low

Browse Pxxx codes or P066xx codes.

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