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Old 02-07-2004, 05:57 PM   #1
ivrep
Scooby Newbie
 
Member#: 53237
Join Date: Jan 2004
Location: Imperial Valley in South CA.
Vehicle:
2006 sleeper wagon
black

Exclamation Troubleshooting code P0546

Need some help? I got a cel the other day, so I took my car over to an Autozone in Az to get scanned. The code came back as PO546 defined as : the voltage signal from the exhaust gas temperature sensor in bank 1 is too high for the current engine operating conditions. (Bank 1 identifies the location of cylinder #1. While bank 2 identifies the cylinders on the opposite bank). I did get my up and down pipe replaced about a month ago with the cel fix, this is the first cel I have ever had on my 04 wrx. Could this cel be a result of the missing cat in the up pipe? I am at a loss since I didn't get the cel earlier.


If I put this in the wrong forum, sorry.
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Old 02-07-2004, 08:04 PM   #2
Mulder
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Chapter/Region: Tri-State
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15 WRX/05 GTO

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Well, you could have posted this in 2.0 turbo, or better yet done a search as this is a well-discussed topic. But you're new, so I'll help you out -
The CEL fix is for the catless downpipe only, to prevent the P0420 catalyst inefficiency code. It has nothing to do with your uppipe.
When you had the uppipe done, what became of the factory EGT probe? Was it re-installed in the new uppipe, or disconnected and removed? The code you got is usually from an open EGT probe circuit caused by either the probe going bad or having been disconnected.
The way to correct it is to install a 2.2K ohm resistor in the connector where the EGT probe wire connects. This will simulate a proper EGT reading to the ECU. If your stock probe is still in place, it can be removed after putting the resistor in, and the mount in the uppipe plugged with a bolt.
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Old 02-09-2004, 10:02 PM   #3
ivrep
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Location: Imperial Valley in South CA.
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2006 sleeper wagon
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The EGT probe was reinstalled with the new uppipe. Which wire on the EGT does the 2.2k ohm resistor connect to? I would like to do it myself, but if its a little tricky I might take it over to a shop. Thanks for all your help! And your kindness in regards to my newbieness.
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Old 02-09-2004, 10:43 PM   #4
motoxphil
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11.96, 1.64, 115mph!

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Just unplug the connector, bend the resistor into a "U" shape and insert into the harness.

Thanks,
Phil
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Old 02-09-2004, 10:56 PM   #5
ivrep
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Thanks friend.
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