Diagnostic Aids

WARNING: This page is about a different car, the 2004 Pontiac Grand Am and 2004 Oldsmobile Alero. However, it is still accessible from the selected car via links, so may be relevant.

Inspect for intermittent input speed sensor (ISS) circuit conditions.
Inspect for intermittent output speed sensor (OSS) circuit conditions.
Inspect for an incorrect calibration.
Refer to Range Reference .
Ensure the wiring harness is not stretched too tightly or other components are pressing on the connector body. Also, inspect for proper clearance to any other components and wiring. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.