1995 Mitsubishi Eclipse Logo
Posted on Jul 22, 2011
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My 95 eclipse is throwing codes 12, 31, 43, and 55 what do these codes mean?

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  • Master 4,044 Answers
  • Posted on Jul 22, 2011
Anonymous
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12-cam shaft position Timing over retarded
31- HO2S heater Control Circuit Low (Needs a new O2 Sensor is what this is telling you)
43- HO2S Heater Control Circuit Low (Bank 1 Sensor 3)
55- HO2S Heater Resistance (Bank 1, Sensor 3)
All of those assume they are supposed to be preceded by a P00

If you are getting ODBI codes these are teh definitions you are looking for:
Code 12 Air flow sensor fault
Code 31 Knock sensor fault
Code 43 EGR fault
Code 55 AV valve position sensor

These may make more sense with that year model.

Testimonial: "thanks man, you lead me straight to the problems and i was albe to knock out the check engine light in less then 3 hours"

  • Rodrigo Huezo
    Rodrigo Huezo Dec 09, 2011

    but what was the problem? what did u do to fix it? u got help now u can help other by tellng what u did.

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  • Contributor 6 Answers
  • Posted on Nov 12, 2011
Rodrigo Huezo
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Cheers,

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