What causes a P0655 code?

P0655 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 P0655 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0655 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

P0655

Engine Hot Lamp Output Control Circuit Malfunction

What it means

The Engine Control Module (ECM) has detected a voltage or continuity issue within the circuit responsible for controlling the engine over-temperature dashboard warning lamp.