What causes a P0510 code?

P0510 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 P0510 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0510 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

P0510

Closed Throttle Position Switch Functionality Malfunction

What it means

Indicates a failure in the switch that signals the ECM when the throttle plate is in the fully closed (idle) position. On heavy-duty diesel engines, this often relates to the idle validation circuit within the accelerator pedal assembly.