What causes a P0328 code?

P0328 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 P0328 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0328 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

P0328

Knock Sensor 1 High Circuit Input

What it means

The engine control module detects a voltage signal from the knock sensor circuit that exceeds the maximum calibrated threshold, indicating a circuit fault or extreme engine vibration.