Diagnostic Aids

WARNING: This page is about a different car, the 2002 Pontiac Sunfire and 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

If the complaint was Engine Cranks But Will Not Run, you may set DTC P0336 when attempting to start the engine more than 15 times, and the ignition is not turned OFF between attempts.
An intermittent problem may be caused by a rubbed-through wire insulation, poor electrical connections or broken wire inside insulation.
Thoroughly check any suspected circuitry for backed-out terminals, improper mating, broken locks, improperly formed terminals, damaged terminals, poor terminal-to-wire connections or physical damage to wiring harness.
An intermittent can also be the result of a defective reluctor wheel. Remove the crankshaft sensor and inspect the reluctor wheel through the hole.