Does doing a hard reset clear "C" as well as "P" codes or do "C" codes have to be cleared using WDS, etc?

 

If only DTC's were that easy to remove!

A hard reset doesn't even clear Pxxxx codes. It only resets learned settings in volatile memory such as fuel trims back to default and window travel limits.

Graham

 

That's what I thought. If the part has been repaired will the CEL/DTC eventually reset or must it be done using the factory software?

Thanks

 

Depends what the fault was.

 

I have a "C1137" ABS Module Failure. Had it repaired but since I still have the C1137 code not sure repaired module is good. So, should I just go have it reset or wait for several drive cycles. Only issue now is no ABS, Trac or ASC. Still drivable.