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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 77 (Engine Controls - Self-Diagnostics - 3.0L) >> Diagnostic Tests >> DTC P0337: CKP Sensor Circuit Low Duty Cycle >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2002 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

A short to ground on either Purple/White wire or White/Black wire will not affect the CKP sensor signal to the ECM and will not set any CKP sensor circuit DTCs.

Ensure the battery cables are clear of the CKP sensor wiring, which may cause electromagnetic interference. Make sure that 2.5 volts are present on Purple/White wire and White/Black wire from the ECM with the CKP sensor disconnected. This voltage protects against EM interference.

Missing, damaged or broken teeth on the crankshaft reluctor wheel can set this DTC. If the crankshaft was recently replaced or the vehicle/engine is new and this DTC is set, check all teeth on crankshaft reluctor wheel.

If no faults are found, replace the CKP sensor.

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