Question about 1999 Toyota Camry Solara

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99 toyota check eng.lt on code po300,po303,po305,po171,p0420

I added injector cleaner to try to clean the injectors and next step would be to put new wires and plugs in any other ideas before I go to the dealer
thanx
Dan

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  • leb2010 Dec 15, 2008

    this is all the codes that came up

  • leb2010 Dec 15, 2008

    I got these codes from auto zone
    the o2 sensor seems knew


  • Toyota Ed May 11, 2010

    Explanation Leb2010 and Shotta:

    P0300 indicates a multiple cylinder misfire.

    P0303 and P0305 indicate a misfire specific to cylinder 3 and 5.

    P0171 indicates a fuel trim issue; attributable to dirt or other debris on the detection wires inside the mass air flow sensor.

    P0420 indicates an O2 issue, most likely due to a lean or rich condition from the abovementioned P0303 and P0305, injectors either rich (sticking open), or lean, (injectors not firing), or a spark delivery issue.

  • Toyota Ed May 11, 2010

    po300,po303,po305,

    You can replace the plugs, wires and the coil packs on cyls

    3 and 5, but if the problem continues, I'll bet that you are going to need to replace the injectors.

    This is from a lot of experience.



    po171, Clean the mass air flow sensor, it is dirty inside.

    Very common code.



    p0420 Indicates an O2 sensor issue, ignore this code until you get the #3 and #5 issue rectified.

  • Toyota Ed May 11, 2010

    What is the Code for the check engine light being on?

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First Dan these car s are very sensitive, you don't ned to go to the dealer go to you local auto-zone and have dem check the light its free. I could be a number of things but just for starters if you have more than 60,000 miles, it could mean you need oxygen sensor but don't guess have it checked and get back to me I will be more than glad to help. Good Luck. hey and leave me a rating.. thanks

Posted on Dec 15, 2008

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