P0031 code...
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This is a discussion on P0031 code... within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; ... Here is what my computer told me. It is a powertrain code. H025 Heater control circuit low (bank 1 ...

  1. #1
    Registered User DonkeyHarlequin's Avatar
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    P0031 code...

    ... Here is what my computer told me. It is a powertrain code.
    H025 Heater control circuit low (bank 1 sensor 1). Does anyone know what this is. And is it hard to fix?

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  3. #2
    Registered User DonkeyHarlequin's Avatar
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    I know it has been answered before. I used the search on the forum and it kept telling me it was locked out and to contact a moderator. I actually found it linked from google back to this site after I posted. It sounds like it is the front O2 sensor. I just didn't understand why it was calling it a heater control.

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    Registered User EvoEatr's Avatar
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    someone correct me if im wrong here but......theres a heater in the 02 sensor to get it up to temp. quicker....your 02 sensor either has 3 or 4 wires...1 is the signal wire for the computer, 1 is the ground wire, 1 is the power (i believe) for the heater circuit , and if you have a 4th i believe its another ground for the heater circuit (if you only have a 3 wire i think both circuits share a common ground)
    Last edited by EvoEatr; 10-04-2008 at 10:02 PM.

  5. #4
    Registered User scaryc's Avatar
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    i fixed this problem on my 03 wrx by installing an OEM sensor. i first made the mistake of buying a universal sensor. . . the ECU did not detect it and the CEL came right back on after clearing the code. installed OEM part, cleared code and problem solved

  6. #5
    Registered User DonkeyHarlequin's Avatar
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    Thanks to all that posted. Now I just need to swallow the pill of paying $150ish dollars for the damned thing.

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