What causes a P0232 code?

P0232 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 P0232 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0232 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

P0232

Fuel Pump Secondary Circuit High

What it means

The Engine Control Module (ECM) has detected voltage is present on the fuel pump secondary circuit when the pump should be inactive or commanded off.