CEL mystery - Subaru WRX Forum
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post #1 of 3 Old 05-26-2008, 03:08 PM Thread Starter
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CEL mystery

My CEL came on about a week ago so I decided to go to autozone and get it checked out. It turns out to be code PO546, which has something to do with the voltage signal from the EGT sensor in bank 1. The car seems to be running fine but I don't want to risk anything. Also, I have had the TB system on for about 10 months now and have not had any problems with it. No CEL or anything.

My current mods are:
Full SRS catless TB exhaust (w/Co2 simulator)
Turbo XS catless UP
Turbo XS BOV
Perrin Lightweight Crank pulley
K&N air filter w/snorkel/silencer removed

I'm sorry if this question has already been asked but I was just looking for some advice/tips. Any help would be much appreciated.

Last edited by blink3020; 05-26-2008 at 04:24 PM.
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post #2 of 3 Old 05-27-2008, 06:29 AM
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It's because you have a catless UP. Did you remove the EGT sensor entirely? Sounds like you don't have any engine management. I'd look into that right away or your going to get CELs for overboosting rather than just a tripped sensor. Either EM or a mechanical resistor fix will take care of that.

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post #3 of 3 Old 05-27-2008, 06:08 PM
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do you have a boost guage? does this code come up only when you floor it? ive got an 04 w/catless up without any cells. i would cheak and make sure you dont have boost creep. a mechanical fix may make the light go off but you may have a problem.. might be time for new plugs, fuel filter and maybe some good injector cleaner.
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