Question about 2002 Buick LeSabre

5 Answers

Code po480 replaced relay and blown 30 amp fuse, reprogram to turn check engine light off it will go off and when you go 1/4 mile it will turn on engine light again. (if engine is worm the radiator fan will run) like there isnt any thing wrong code po 480 will come on, reflash go 10 miles then check engine light comes back on USING A OBD 11CODE READER thanks for help

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  • dill157914 Jun 30, 2008

    i signed up a little bit ago. and hope you can solve this problem. thanks again jd

  • dill157914 Jun 30, 2008

    the generic code says it is cooling fan #1 control circuit malfunction, you said something about cat. converter, could be going bad, is this correct.
    or do we go back to the fan po480 remark, thanks jd

  • dill157914 Jun 30, 2008

    removed batt. cable, and let set 30 min. same on start up
    plugged in and tried to reset several times, no go
    i will go and accept your answer any way
    appreciate your responce
    THANKS AGAIN JD

  • dill157914 Jun 30, 2008

    fan runs even hooked as from factory, hooked wire saturday fan works fine no short at all.
    if you let run turns on and blows about 1/2 way up on heat gauge

  • dill157914 Jun 30, 2008

    no help but will replace fans
    will accept your help, you might not be wrong,you have new ideas
    THANKS AGAIN JD

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5 Answers

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Do both fans work for sure? You may want to replace the fans runs anywhere from 140$ up to 250$ depending on the brand.
Keep me updated.
Thanks,
Lee

Posted on Jun 30, 2008

  • Lee A.
    Lee A. Jun 30, 2008

    If you need help locating the parts just let me know. # 620636, # 75421 are the part numbers for the fans on www.rockauto.com
    Thanks,
    Lee


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This code is generally for the fan. It could be a loose or broken wire or it could be that the fan is going out and not working on a regular interval or coming on at a higher temp then it should.

Posted on Jun 30, 2008

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These cars have problems with the magnet falling off the cam gear it is just glued on and will often start to seperate. usually this results in a "Hard code p480" and the only drivability problem would be a slightly longer crank time and the injectors will not fire sequentially anymore. It could also possible sugjest a timing chain that is sloppy, if the chain actually slipped it would probably strip of gear teeth and it would not be an intermitant problem. I sugjest that you start by having the cam sensor signal tested or if you have a LabScope yourself Test the waveform generated by the sensor. Look for drop outs or a low amp out-put signal.

Hope that helps

Posted on Jun 30, 2008

  • Mark Gil
    Mark Gil Jun 30, 2008

    Oh if that the case you may need to check the wiring because there can be a short of wire there possible you can also do this for isolation ,Disconect the fan ,run a fused (Correct Amp) jumper wire direct to battery ,see if it blows the fuse. If it does you`ve found your problem..



    Hope that helps.....

  • Mark Gil
    Mark Gil Jun 30, 2008

    The rason for that is Fan 1 is not functioning properly and mya stop sometimes while running and that can be a problem with a short wiring that's why I'm asking you to check the wiring.

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Sir,

There are three types of issues that will set a code and two that will turn on the light. Your shop will need a very good scanner, an enhanced scanner with OEM Ford software, one will set a code inone driving trip but will not turn on the light. A problem in two trips will turn on the light BUT if the problem fixes itself then the light will go out on its own. There is a history of the problem stored in the computer scan data, it is called a freeze frame. If the catalytic convertor is in danger of being damaged then the ceck engine light will come on and usually flash, when that problem goes away so will the light. Freeze Frame scan data, get it checked out by a real shop with an OEM enhanced software scanner. It does not have to be the dealer, make some phone calls and go to the best shop, yes they may also charge the best (for them) price.

Thanks
Good luck



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Posted on Jun 30, 2008

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