FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.

C4

C4 VERIFY CONCERN IS RESOLVED

- Clear all DTCs.

- Perform the On Demand Self-Test.

NOTE: If the problem is intermittent, a drive over rough roads and through a car wash is recommended.

Are any DTCs retrieved?

> Yes
- If original DTC is retrieved. C1

- If a different DTC is retrieved. Diagnostic Trouble Code Descriptions

> No
Stop. Repair is complete.