How do I tell which o2 sensor is bad?
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This is a discussion on How do I tell which o2 sensor is bad? within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Does the 0031 code tell you which sensor is bad? i ask because i unpluged the front o2 on accident ...

  1. #1
    Registered User Wilz02wrx's Avatar
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    How do I tell which o2 sensor is bad?

    Does the 0031 code tell you which sensor is bad? i ask because i unpluged the front o2 on accident (someone had given me the location of the o2 sensor plugin come to findout ti was the front they told me) no new code came up or anything so now i think it could be the precat one i really dont want to spend the money to buy both is there a way to figure out which one is causing my problem?
    Dirty Crew #8807
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  3. #2
    Geriatric Ginger Mod Rogan's Avatar
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    0031 = Front O2 Sensor Low Input
    0032 = Front O2 Sensor High Input

    0037 = Rear O2 Sensor Low Input
    0038 = Rear O2 Sensor High Input



    Of course, the front O2 is the salty dog..
    Rogan o_0
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    '97 Dodge 3500 CTD DUALLY built Auto - 40psi boosties - 750 lb/ft

  4. #3
    Registered User Wilz02wrx's Avatar
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    ok yeah i figured that out now i unplugged both and when i unplugged the back one a new code came up. so low output means i need a new one right?
    Dirty Crew #8807
    02 wrx 246awhp sold to get 03
    03 wrx 400awhp also sold to get a house
    currently shoping though

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