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Old 01-21-2002, 10:05 PM   #1
Kenneth2000
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Default P1312 - Exhaust Temp. Sensor Malfunction

I just pulled this code from my car.....(2002 WRX)

Does this typically mean that the O2 sensor is screwed? Maybe we goofed it up putting in the new up-pipe & downpipe? (installed them 10 days ago)

Any thoughts? Should I just order a new OEM 02 sensor?
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Last edited by Kenneth2000; 01-21-2002 at 10:12 PM.
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Old 01-22-2002, 09:06 AM   #2
Jon [in CT]
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Check again to make sure their aren't additional trouble codes stored, like P0545, P0546 or P1544. If P1312 was the only code stored, then you'll have to replace the EGT sensor (NOT the O2 sensor) which is located on the uppipe.
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Old 03-18-2002, 10:46 PM   #3
krex
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Question egt sensor malfunction

i am interested in how this was handled. i have an aftermarket uppipe and downpipe as well, and my egt has decided to quit?
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Old 03-19-2002, 06:51 PM   #4
WRXSTi69
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Default Re: P1312 - Exhaust Temp. Sensor Malfunction

Quote:
Originally posted by Kenneth2000
I just pulled this code from my car.....(2002 WRX)

Does this typically mean that the O2 sensor is screwed? Maybe we goofed it up putting in the new up-pipe & downpipe? (installed them 10 days ago)

Any thoughts? Should I just order a new OEM 02 sensor?
Your aftermarket up/downpipes are causing higher than normal exhaust temps, that cooked the sensor. Just hope they're not also causing a lean condition as well, or pistons will be next.
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Old 03-19-2002, 07:30 PM   #5
Jon [in CT]
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I happen to subscribe to the theory that the EGT sensor mounting bungs used by most aftermarket uppipes do not allow the sensor to seat properly. This leads, according to my theory, to either a loose sensor or to sensor damage. There probably was a reason why the Service Manual cautioned that the EGT sensor must be oriented in a particular way in the OEM uppipe.
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Old 03-19-2002, 11:17 PM   #6
Greenracer6
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Default egt sensor

My stock sensor went bad and caused my car to be a paper weight. I finally made SUbaru change the egt probe at MY expense and that solved the problem. $80, then install ed by Subaru only.

This is upseting of coarse.
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Old 04-04-2012, 12:12 PM   #7
rotheee
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Quote:
I happen to subscribe to the theory that the EGT sensor mounting bungs used by most aftermarket uppipes do not allow the sensor to seat properly. This leads, according to my theory, to either a loose sensor or to sensor damage. There probably was a reason why the Service Manual cautioned that the EGT sensor must be oriented in a particular way in the OEM uppipe.
So does anyone know for a fact that the probe needs to be oriented a certain way? And if so, what way does it need to be put in?


I need help! I believe this is why my car is stuck in limp mode. Just ordered a new OEM EGT probe for it, will be in soon.
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Old 08-31-2012, 12:03 PM   #8
ToddMcF2002
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Question: I have a megan downpipe and a stock uppipe with the EGT, and a p1312. Should I do the resistor mod or replace the EGT? Thanks for any advice...
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Old 08-31-2012, 03:34 PM   #9
ToddMcF2002
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OK so I went and did the resistor mod and after driving for about a half hour the code was still on so I cleared the ECU. I drove another half hour and so far no code... but I've been fooled before
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Old 08-31-2012, 11:24 PM   #10
ToddMcF2002
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I enjoy talking to myself I guess. Maybe it will help someone some day... 70 miles and no cell. Should I get my hopes up? Hard to believe $1.20 in resistors can fix something
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