Subject: Re: Running bad, codes, Need Help Please by josephf31 on 2011/8/17 0:48:54
Quote:
BillH wrote: Quote:
josephf31 wrote: My guess would also be that the EGR would not cause that much trouble. What are the first 2 codes?
C12 means there are no codes (at the time the codes are read). Almost all codes switch from C (current) to H (history) when the key is turned off.
H28 is the Quad Driver, module 3, monitors voltage it the ECM to fan relay circuit.
Thanks; none of those sound like (to me) they would cause the symptoms reported. Not to be pessimistic but it sounds more serious; possibly bad injector(s), distributor gear/timing chain? Just thinking out loud, not sure any of those would throw codes...