What causes a P1655 code?

P1655 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 P1655 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P1655 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

P1655

Amber warning lamp driver short circuit high

What it means

The ECM has detected battery voltage on the control circuit for the Amber Warning Lamp when the lamp should be OFF, or the current draw exceeds the expected threshold, indicating a short circuit to a power source.