P0667
Control Module Internal Temperature Sensor A Range/Performance
Control module / internal sensor
Generic OBD-II
High
What it means
P0667 means a temperature sensor built into the engine, powertrain, or transmission control module is reporting a reading that is outside its expected range. It is a self-monitoring code for the module's own internal heat, not a sensor out on the engine. It rarely stops the car, but the module may limit performance if it believes it is overheating.
High
Can I keep driving? Usually drivable, but the module may enter a protective limp mode or shut down if it thinks it is overheating — have it checked before long trips.
Common symptoms
What you'll notice
- Check-engine light on
- Often no noticeable driving change, just a stored code
- Possible reduced power or limp mode if the module protects itself from heat
- Intermittent stalling or restart issues in extreme heat (less common)
Common causes
Most likely first
- Faulty internal temperature sensor inside the ECM/PCM/TCM moduleLikely
- Module overheating from a poor mounting location or blocked airflowCommon
- Internal module fault or degraded solder/board connectionCommon
- Software or calibration issue reporting an implausible temperatureLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and note any other module or overheating codes stored with it.
- Confirm the module is mounted securely and not exposed to an abnormal heat source.
- Check for a software update or reflash from the manufacturer that addresses the code.
- If the internal sensor reads implausibly, the module itself is usually replaced or reprogrammed. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0667?+
Usually yes for short trips, but if the module thinks it is overheating it can drop into limp mode, so get it diagnosed soon.
Can I just clear P0667?+
You can, but it returns unless the internal sensor or the module's heat exposure is corrected.
Related codes
Often seen with P0667
Read & clear P0667 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX