Test Description

WARNING: This page is about a different car, the 2003 GMC Savana and 2003 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to the step number in the diagnostic procedure.

1

Service the ABS before diagnosing for a misfire, because an actual engine misfire may or may not exist. The following 2 examples illustrate how this DTC can be set with or without an actual engine misfire:
- There was an actual engine misfire during an ABS malfunction.
- The vehicle operator drove on a rough road, the ABS could not detect this due to a malfunction, and the PCM interpreted the variations in crankshaft speed caused by the rough road as a misfire.