What do these codes mean?

Discussion in '1994 - 1995 Specific Tech' started by cmills26, Dec 10, 2003.


  1. cmills26

    cmills26 New Member

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    I just ran some codes on my 95 Cobra. It came back with 172,173,176,543. I checked the book and it says that the 172-176 codes are "Heated Exhaust Gas Oxygen sensor- voltage signal indicates "rich", Bank 1 and 2. I just ordered new O2 sensors so that should take care of that problem. They are the original sensors. The 543 code reads this, "Fuel Pump circuit open connection- Electronic Control Assembly to battery. I have no clue what this means or how to fix it! Does anyone know what this means? I would appreciate it if someone can give me some info! Thank you!
     
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  2. cmills26

    cmills26 New Member

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    Does anyone have a clue on what these mean or a way that I can fix the problem? I really need some advice! Thanks
     
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  3. 1105

    1105 I AM the random post master...bow down

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    do you have LT headers? If so thats why you got that rich condition code... I dont think theres any way to get around that unless you have an adjustable fuel pressure reg. and turn down the fuel pressure a little bit
     
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  4. cmills26

    cmills26 New Member

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    I have the stock headers on. The only upgrades I have done are K&N, O/R H-Pipe, Flowmasters, pulleyes.
     
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