Engine/Power - EJ25T (STI and 2006+ WRX) Discussions about the USDM 2006+ WRX and WRX STi 2.5 liter turbo flat-four.

P0031 code?

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Old 11-17-2008, 08:00 PM
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P0031 code?

Hey, what's up everyone? I am in need of some advice. I have a 2005 STI with 53,xxx on it with a TBE protuned. For the past two weeks now I have been throwing a code.
P0031 HO2S Heater Control Circuit Low (Bank 1 Sensor 1)

From what i have searched, this has to do with the o2 sensor. My question is, do I need to replace my o2 sensor? Is there anything I can do besides taking my AP and clearing these codes, or is my only option to replace it?
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Old 11-17-2008, 08:06 PM
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looks like you damaged your o2 sensor wiring when installing the tbe. easy way and probably only way is to buy a new o2 sensor or a used o2sensor
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Old 11-18-2008, 07:34 AM
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How does one damage the front air/fuel ratio sensor installing a tbe?

A new sensor = ~$200.
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Old 11-18-2008, 08:43 AM
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Originally Posted by Paul@dbtuned
How does one damage the front air/fuel ratio sensor installing a turbo back exhaust?
fixed
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