Circuit/System Testing: P0324

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: If P0325, P0327, P0328, P0330, P0332, or P0333 are also set, diagnosis those DTCs first.

DTC P0324 indicates an internal control module circuitry failure. Replace the ECM.

P0325, P0327, P0328, P0330, P0332, or P0333

Ignition ON, engine OFF.
Disconnect the appropriate KS harness connector.
Measure for 2-3 volts between each of the following circuits and ground on the ECM side of the harness connector.
- The KS signal circuit terminal A
- The KS low reference circuit terminal B
- If less than the specified range, test the circuits for a short to ground or an open/high resistance. If the circuits test normal, replace the ECM.
- If greater than the specified range, test the circuits for a short to voltage. If the circuits test normal, replace the ECM.
If all circuits test normal, replace the KS.

P0326

IMPORTANT: If DTC P0325, P0327, P0328, P0330, or P0333 are also set, diagnose those DTCs first.

Inspect for a loose or broken engine mount, engine mounted accessory, or accessory mounting bracket.
Inspect for excessive engine mechanical noise. Refer to Symptoms - Engine Mechanical .