Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Sonoma, 2003 GMC Safari, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.

The following conditions may cause this DTC to set:

Poor connection or poor terminal tension at the sensor.
Crankshaft reluctor wheel damage or improper installation.
Excessive air gap between the CKP sensor and the reluctor wheel.
The engine running out of fuel.
Foreign material passing between the sensor and the reluctor wheel.

Excess crankshaft end play causes the CKP sensor reluctor wheel to move out of alignment with the CKP sensor. This could result in any one of the following:

A no-start.
A start and stall.
Erratic performance.

For an intermittent, see INTERMITTENTS in TROUBLE SHOOTING - NO CODES - 4.3L ASTRO, BLAZER, JIMMY CANADIAN, SAFARI, SONOMA & S10 PICKUP article.