Help with a CEL!!
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This is a discussion on Help with a CEL!! within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I see that there are other postings for a CEL 420 but most of them talk about adding a resistor ...

  1. #1
    Registered User mach1914's Avatar
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    Help with a CEL!!

    I see that there are other postings for a CEL 420 but most of them talk about adding a resistor for the fix. I would rather do it the right way. I just got a 02 WRX. It had a 4" catless down pipe, a Magnaflow exhaust and a turbo XS BOV. I was having after fire problems so I went back to a stock BOV and replaced the cheap intake with a K&N Typhoon. The next day I got a CEL 420 with a 546. I was about to get a cobb access port and take it to a stage 2 but don't want to waste the money if I need to go another way. Anyone have any ideas??????

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  3. #2
    Baconator azWRX06's Avatar
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    No need for the resistor. The P0420 is due to the removal of the cat. The AccessPort will suppress O2 error codes like this. I highly recommend purchasing the AP and going to the Stage 2 map.

    As for the P0546 try this link for more info http://www.fastwrx.com/p0exgastesec.html it explains why you got that. The AP should suppress this as well.
    Last edited by azWRX06; 07-24-2007 at 11:54 AM.
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