Cammin' 08 Posted December 23, 2014 Report Share Posted December 23, 2014 Hey guys I'm currently trying to trouble shoot this code on my wife's 2007. Back story. I took the car in to get warranty work due to a misfire. They replaced the 1 coil but immediately after the misfire fire came back. They then replaced the same plus 3 other coils and the PCM plus all 6 plugs. The misfire is gone. I pick It up and once I leave the parking lot the check engine light comes back on. The service rep said they would need to replace the down stream 02 and the bank 1 cat. This I did my self since it was not covered under warranty. After replacing the o2 and cat the light is still on. Any suggestions, TSBs, or anything would be greatly appreciated. John Quote Link to comment Share on other sites More sharing options...
akirby Posted December 23, 2014 Report Share Posted December 23, 2014 Sounds like driving it with the misfire fried the catalytic converter. 1 Quote Link to comment Share on other sites More sharing options...
Cammin' 08 Posted December 23, 2014 Author Report Share Posted December 23, 2014 Possibly but the issue is I already replaced the cat and downstream o2 and tge code still shows. 1 Quote Link to comment Share on other sites More sharing options...
autom8r Posted December 23, 2014 Report Share Posted December 23, 2014 I think the ECM is retaining the code. How many miles have you put on it since you've made the repairs? You may need to drive 50 miles or so before the code will clear itself. This may be a dumb question, but is there an exhaust leak? What is the condition of the upstream O2 sensor? I know they're expensive to replace, but I replace all four to make sure their readings "drift" as a set. 1 Quote Link to comment Share on other sites More sharing options...
Cammin' 08 Posted December 23, 2014 Author Report Share Posted December 23, 2014 I've cleared the code and put roughly 50 miles or so and it popped back on. No exhuast leak. I had a minor one but got it readjusted and fixed. I just ordered a new one from rock auto today so once it gets here I'll put the upstream one in. Just for testing I had a few extra sitting around from my mustang so I put one in to see if it'll help. Quote Link to comment Share on other sites More sharing options...
autom8r Posted December 23, 2014 Report Share Posted December 23, 2014 You could swap the o2 sensors side to side and see if the code moves with the sensors. Did you replace the cat on the side with the misfire? Are these stock Ford cats or aftermarket? Quote Link to comment Share on other sites More sharing options...
akirby Posted December 23, 2014 Report Share Posted December 23, 2014 Sorry didn't see that you already replaced the cat. Quote Link to comment Share on other sites More sharing options...
Cammin' 08 Posted December 23, 2014 Author Report Share Posted December 23, 2014 (edited) They are after market cats. Unfortunately the price difference between and aftermarket and OEM is a huge price difference. Both OEM sensors are/will be OEM. Unfortunately the misfire was on both sides so I'm just trying get the 1 side fixed. I'm pulling the manifold today to check all the gapping and sure the plugs are good along with all the vacuum lined and so on. Edited December 23, 2014 by Cammin' 08 Quote Link to comment Share on other sites More sharing options...
battman76 Posted August 3, 2016 Report Share Posted August 3, 2016 Cammin' 08, did you ever get this resolved. I have the same exact problem now after a cylinder #2 misfire, burnt coil, and fried and repaired pcm. I haven't dropped the exhaust to look at the cat, but was wondering if and how you got it resolved. 2 Quote Link to comment Share on other sites More sharing options...
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