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Guest Message by DevFuse
 

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Replaced exhaust and I have codes now?


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8 replies to this topic

#1 Nbe1210

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Posted 10 March 2013 - 08:00 PM

I just replaced the exhaust from the front cat all the way back on my 97 legacy Brighton with a used exhaust from a 98 outback. It fit perfect and I only payed $150 for it. When I started up the car it was idling rough and the check engine light was on. I thought the light was from th e 02 sensor so I disconnected the battery and it was still there after 10 minutes disconnected.
We checked the wires form the distributor and they were all firing.
I left my friends place and went to the auto parts store to scan the codes. The car ran really rough at idle and stalled as I was turning into the parking lot. I almost hit the sign as I lost my power steering suddenly. It was close.
They scanned the codes. I started the car and drove the 10 minutes home and the car ran perfectly.
So hear are the codes
P0403 - Exhaust Gas Recirculation Circuit Malfunction
po505 Idle control system malfuction
P0443 Evaporative Emission Control System Purge Control Valve Circuit Malfunction
I found this info on the interweb.

Any ideas? I have no clue what's happening. Thanks for any help

#2 johnceggleston

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Posted 10 March 2013 - 08:20 PM

whenyou replaced the exhaust, what else did you do to the car?



#3 Nbe1210

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Posted 10 March 2013 - 08:23 PM

Nothing was done other than the exhaust. We unplugged and replugged in the 02 sensors but nothing more. I believe the 02 code is PO420. I checked the transmission fluid. That's it. ?????????

Edited by Nbe1210, 10 March 2013 - 08:23 PM.


#4 johnceggleston

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Posted 10 March 2013 - 08:51 PM

did you use your original o2 sensors or the ones that came with the exhaust?



#5 Nbe1210

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Posted 10 March 2013 - 09:05 PM

I used my front sensor as I had replaced it this past summer with a new one and I think I used the rear from my old exhaust also.

#6 1 Lucky Texan

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Posted 10 March 2013 - 10:33 PM

odd

 

no one slipped with a tool and hit any hoses or wiring?

 

P0420 can be caused by many problems, but exhaust leak is one.



#7 lmdew

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Posted 11 March 2013 - 04:14 AM

Did you have the air filter box off to work from the top on the O2 Sensor connectors?  Check the hoses.



#8 Nbe1210

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Posted 11 March 2013 - 05:52 AM

The air filter never came off and the only the three codes i listed above came up on the scanner. No po420. I'll look at the hoses when I have a chance later today. Those plugs on the 02 sensors are a pain to unclip. Maybe something got bumped or knocked loose. Thanks for the thoughts. I'm hoping it drives ok today so I can get to work.

 

Update:  I drove to work this morning and the CEL was on but the car drove fine.  Better than it has in a while in fact.  I  just drove to another building and the CEL is off and all seems fine.  Maybe it was just a computer hiccup??


Edited by Nbe1210, 11 March 2013 - 10:54 AM.


#9 mikaleda

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Posted 11 March 2013 - 01:29 PM

You might want to check the grounds to your ECM.




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