jrm94mark8
Registered
I recently purchased an innova tester to read the check engione codes onmy 1994 Mark 8. I posted about it a while back and finally have them retrieved and want to get advice. A little background first. I get the check engine code only on the highway or if I really wind the car out and get the rpm's up. I had them read a while back by a mechanic and it was throwing 3 codes - 02 sensors and a fuel one - can't remeber exactly. Anyway - he told me I had an intake leak and thought thought could be a culprit....allowing too much cool air in and throwing codes. I had that fixed and the check engine light came back. I didn't go back there and got this reader. So - I just read the codes and this is what it is telling me alog with the code descriptions in the code readers book.
172 HEGO (H02S) sensor fault/lean
176 HEGO (H02S) sensor fault/always lean
177 HEGO (H02S) sensor fault/always rich
524 Low speed fuel pump circuit open - baery to ECA
543 Fuel pump secondary circuit fault
I'm defintiely thinking the 02 sensors but not sure if the fuel ones are being thrown because of the 02? Anyone seen this or have advice? Should I replace 02 sensors, clear codes, and test again? Anything I should be worried about? The car runs great but is a bit tought to start in the cold and the idle isn't as smooth as it once was.
Thanks for any help-
172 HEGO (H02S) sensor fault/lean
176 HEGO (H02S) sensor fault/always lean
177 HEGO (H02S) sensor fault/always rich
524 Low speed fuel pump circuit open - baery to ECA
543 Fuel pump secondary circuit fault
I'm defintiely thinking the 02 sensors but not sure if the fuel ones are being thrown because of the 02? Anyone seen this or have advice? Should I replace 02 sensors, clear codes, and test again? Anything I should be worried about? The car runs great but is a bit tought to start in the cold and the idle isn't as smooth as it once was.
Thanks for any help-