What causes a P0667 code?

P0667 can be triggered by several issues — see the verified probable causes and step-by-step diagnostics shared by mechanics and owners on OBDIY.

Can I drive with a P0667 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0667 active.

Follow the step-by-step diagnostic on this page, then read the verified fixes contributed by other Heavy Truck owners — the answer marked "Verified Cause" worked for the original poster.

OBDIY

OBD-II

P0667

PCM/ECM/TCM Internal Temperature Sensor Range Performance

What it means

This fault code indicates that the internal temperature sensor within the engine control module has detected a temperature value that is outside of the expected operating range.