What causes a P1480 code?

P1480 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 P1480 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P1480 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

P1480

EGR CAN sensor permanent governor deviation

What it means

The Engine Control Unit (ECU) detects that the EGR valve position is deviating significantly from the commanded (target) position. The 'governor deviation' indicates the valve's motor cannot overcome resistance or has lost calibration.