What causes a P0255 code?

P0255 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 P0255 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0255 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

P0255

Injection Pump Fuel Metering Control Intermittent (Cams/Rotor/Injector)

What it means

Indicates an intermittent signal or voltage fluctuation in the fuel metering control circuit or spill valve, typical of high-pressure common rail or electronic unit injection systems.