limp mode??? that is for the trans.

did you monitor the o2 sensor and check the wiring to the upstream to verify harness is good???

Roy

Answered by ASEMaster6371 (expert)
24,836 answers provided

Roy, thanks for the response. I don't know what you mean by "monitor the o2 sensor". Checking the wiring harness looks next to impossible to me the way everything is packed in there.The car will run good till it warms up then starts kinda buckin and losing power and you have to pump the gas to get home.This does'nt sound like this is an easy fix, i'm no mechanic.

Response from johnand lisa
1 question asked

the code indicates a fixed voltage on the o2 sensor. a scan tool is needed to monitor the activity of the o2 sensor under certain conditions. you may need a shop to help you here. do not throw any more parts at it till you know the failure.

does it have an exhaust leak??

Roy

Answered by ASEMaster6371 (expert)
24,836 answers provided

A small one right at the muffler, i would'nt think that because it's downstream of everything that it would matter.

Response from johnand lisa
1 question asked