Intermittent Diagnostic Trouble Codes
INTERMITTENT DIAGNOSTIC TROUBLE CODESIf the malfunction is not present while performing a test procedure, the diagnostic procedures will not locate the problem. In this case, the code can only suggest an area to inspect. Check for the following:
^ loose or corroded conditions
^ damaged components (sensors, tone wheels damaged wiring
^ excessive axle shaft runout
^ hydraulic system leaks
^ foundation (non-ABS) brake system problems
If no obvious problems are found, erase diagnostic trouble codes and, with the key on, wiggle the wire harness and connectors. Recheck for codes periodically while working through the system. This procedure may uncover a difficult to locate malfunction.