Circuit/System Testing: P0324
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
If DTC P0325, P0326, P0327, P0328, P0330, P0332, or P0333 are also set, diagnostics those DTCs first.
DTC P0324 indicates an internal ECM circuitry failure. Replace the ECM.
P0325, P0327, P0328, P0330, P0332, 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 signal 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
- 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 .
IMPORTANT:
If DTC P0325, P0327, P0328, P0330, P0333, P0335, or P0336 are also set, diagnostics those DTCs first.