What causes a P140C code?

P140C 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 P140C code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P140C 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

P140C

CCV inlet temperature sensor under range

What it means

The Crankcase Ventilation (CCV) inlet temperature sensor has reported a voltage signal that is below the minimum calibrated threshold, indicating an electrical 'under range' or short-circuit condition.