This is topic check engine lite wont go off... in forum Tech Talk at Northern California Ford Owners .
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Posted by autumnstang97 (Member # 6111) on
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check engine light came on after the off road pipe. i put the cats on and its still on. i used an OBD2 scanner for the code and it wont read...something is wrong with the plug in part on the car cuz the scanner worked on my 97...i am trying to avoid the dealer...all 02 sensors are hooked up too...
Posted by Blind (Member # 3052) on
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have you tried unplugging the battery for 15 minutes with the headlight switch turned on?
should clear the code, unless there is a problem with the ECU/PCM.
Posted by autumnstang97 (Member # 6111) on
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I did that but i didnt turn of the headlight...i'll try that out...i'm just concerned about the OBD2 plug in the car...why its not working...i guess its a dealer fix? It has a warranty but i dont have any paper work on it cuz i bought from a private dealer...any way to find out warranty info?
Posted by the02stangman (Member # 6223) on
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Did you add cats to the off road pipe? Or did you put the stock h-pipe with 4 cats back on?
If you just welded 2 cats in the off road pipe, then you will need MIL Eliminators. They run about $60.00 and should turn off the light. I have an 02 GT with a Bassani with cats and I had to use them too.
http://www.sacramento-mustang.com/cgi-bin/cart.pl?db|cc.dat|Exhaust
Posted by BCINGUU (Member # 2397) on
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Can you check what codes the EEC is throwing? If you don't have a scanner, you can jumper the engine compartment connector and count the engine light flashes. The shop manual tells how to do that and there are articles online. If you get the codes we'll know for sure how to fix it.
Posted by Xplosive22 (Member # 8210) on
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Originally he had a shop install the x-pipe with test pipes in it. The check engine light came on shortly after. Then about 3 weeks later we pulled it apart and put the bolt-on cats in in place of the test pipes. The CEL is still on.
So we ran to Autozone and rented an OBD II code reader like he said but the reader had an error connecting to the car's computer. It works on his older '97 Mustang, just not the 2007. Not sure why.
We bolted everything back up tight and screwed in the oxygen sensors. It runs fine most of the time but the light won't go away. Not even after pulling the battery for a while. Do the new models need a special handheld to read the codes? I'm about ready to by a tuner but thats a weeks worth of shipping away.
Posted by 1FAST89GT (Member # 5071) on
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yes the newer car 05 or 06 are CAN u need a CAN ready scanner
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