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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 155 (Engine Controls Self-Diagnostics - 5.7L - Bi-Fuel) >> Diagnostic Tests >> DTC P0336: Crankshaft Position Sensor Performance >> Description

DTC P0336: Crankshaft Position Sensor Performance: Description

WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

The Powertrain Control Module (PCM) monitors the Crankshaft Position (CKP) sensor signal in order to determine engine speed. The PCM signals engine speed to the Alternative Fuels Engine Control Module (AF ECM) by pulse-width-modulating the engine speed signal circuit.

This DTC is used to indicate no engine speed signal is being monitored by the AF ECM while the MAF sensor signal indicates the crankshaft is rotating.

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