Please Help..CEL code P0546

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Dec 31, 2003 | 06:45 AM

smokinthunder

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Please Help..CEL code P0546

I know what the code means (P0546- EGT high circuit, sensor 1, bank1), but what I don't know is why I am throwing this code and why it keeps going away and coming back. It will come on at any given time for about 200 miles and then shut off for about 100-200 miles. It's not affecting my engine's performance at all but it is an annoyance. There is'nt any audible knock just in case that would matter. Currently I am running a BPM turbo-back, BPM UP, TXS TMIC, zerosports intake pipe, and a K&N...all of which has been accounted for in my ECUtek tuning. I still have the stock turbo and fuel system. I have had this same map for about 3-4 months now and I just threw the code about 2 weeks ago for the first time. Can any of you subaru guru's or techs give me an idea of why this is happening. I would really prefer not to go to the dealership so they can nag about all my mods.

Dec 31, 2003 | 11:40 AM

GotBoost?

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From: SBAIC-South BayArea Impreza Club-Campbell, CA-Thur

Car Info: 2003 PSM STi

Quote:

What is the CEL fix? It stops the rear CEL code P0420 Catalyst System Efficiency Below Threshold from appearing, this code being caused by the lack of a catalytic converter in the downpipe. This is usually fixed with a Pony Express MIL Eliminator or similar fix. Ensure you obtain the correct type for your model year as there are two types: 02/03 and 04. ***NOTE*** There are two CEL fixes for the WRX, the other one is the 2.2 KOhm 1/2 watt resistor. It is used to combat the CEL code P0546 = Exhaust Gas Temperature Sensor Circuit Malfunction (High Input) in the uppipe. This notice, though not important to this thread, acknowledges there are two "CEL fixes" and defines them individually to avoid possible confusion.

This is a quote taken from here.

Hope this helps out.... good luck

-Ted