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Old 03-18-2006, 10:53 PM   #1
EagleRockWrex
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Default Un-Married AP, Now P0546 Code

P0546- Exhaust Gas Temp. Sensor Circuit High (Bank 1 Sensor 1)

Why am I getting this, EGT sensor is in and hooked up, this car is a handfull of headaches, this is a new problem in my list of 3 already !!!!!
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Old 03-18-2006, 11:39 PM   #2
Uncle Scotty
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....it got cooked by running yer AP....take it out, put in a bolt, and use the 2.2k ohm resistor and be done with it.
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Old 03-19-2006, 04:42 AM   #3
Christian.
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The AP had absolutely nothing to do with this failure becuase this is a hardware failure, most likely. You can have this diagnosed to find the failure point.

Take care,
Christian.

Last edited by Christian.; 03-20-2006 at 02:13 AM.
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Old 03-19-2006, 11:56 AM   #4
EagleRockWrex
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Car has 10k miles on it ....
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Old 03-19-2006, 03:31 PM   #5
bofh
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First, it helps to tell us about your car. From your profile, it says "stage 2" and I am going to guess that you have a gutted up pipe. A hot tune, and no cat can cook the EGT sensor. It is a very common failure. (A search on p0546 would tell you this) The post from Christian was a waste of bandwidth. Software can break hardware. The AP can cook the sensor, but it also usually takes the cat being gone.

As to your "new problem in my list of 3 already..." You better slow down a read some more. This is a basic problem, and not a big risk. Other common mistakes lead to broken ring lands...
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Old 03-19-2006, 08:49 PM   #6
JRSCCivic98
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If you're running an OEM map then the EGT CELs will go off if there is no CAT in the uppipe. This is probably your problem. If you can log (try ecuExplorer from Tari) the EGT sensor and you actually get a changing temp reading while you drive (you can't log it at idle... not enough exhaust gas temp to bring the temp high enough to start the sensor reading) then the ECU is just setting the CEL because there's no CAT in the uppipe. If you put a stock uppipe back in with a cat then it's probably a bad sensor. I've had my OEM EGT sensor in my APS uppipe for 30k+ miles without any problems and it still reads properly.
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Old 03-20-2006, 12:50 AM   #7
Uncle Scotty
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....the EGT probe got cooked....see my above post
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Old 03-20-2006, 12:55 AM   #8
gjhsu
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I love it when people modify their cars, then say it's a headache when stuff goes wrong or breaks

Another vote for EGT probe getting b0rked.
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Old 03-20-2006, 03:38 PM   #9
EagleRockWrex
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Brief history- Was stg II, catless TBE and AP, stock UP. I'm not back to stock TBE and unmarried AP and now I have the CEL and some strange whinning and whistling sounds coming from under the hood and less than 9psi at max boost. However, the car no longer smokes at idle when warm anymore....
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Old 03-22-2006, 01:47 AM   #10
Uncle Scotty
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....deeeeeeeeeeewwwwd....sounds like ya blew the EGT probe outa the UP
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Old 03-22-2006, 02:16 AM   #11
nhluhr
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yeah sounds like the sensor is hanging out of your exhaust... and the tip is easy to damage. Take Uncle Scotty's first piece of advice and replace the sensor with a BOLT. The bolt size you need is:
M12x1.25

Screw it in UBER-TIGHT or else it'll fall out too. To fix the CEL, just unplug the entire EGT probe from the connector on the strut tower and shove the two ends of a 2.2kohm resistor from radioshack into the connector and tape it over to seal it.

But above all, we cannot fix this problem for you. You need to actually go out and LOOK at the car and FIND your problem and fix it. It sounds like you've had some ongoing issues and quite frankly, it sounds like you pulled the panic-move of trying to put it back to stock thinking that would cure the problem. Well, that almost never works.
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