Question about 2003 Toyota Camry

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Engine check light read p0171 and p0420, noticed a leak of engine oil on cylinder 2 area of head gasket when checking the sparks plug, is that the cause?

Got a oil leak on the head gasket around the 2nd cylinder area on a 2003 toyota camry. i think its causing the check engine light p0171 and p0420 read. so if i replace the head gasket will that help? and is it easy to do?

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P0171 code is described as: lean condition bank 1, oxy sensor 1. If your vehicle is a 4 cylinder, which I believe it is.. you have got a lean air/fuel mixture being found by the ecm(computer).This can be caused by several things. The first of which is a possible vacuum leak at or near the intake manifold. This can also be caused by a MAF(Mass Air Flow) sensor problem or even by something as simple as a clogged fuel filter. This lean condition could also be the cause of the P0420 :described as a catalyst efficiency problem. It would be best to have the vehicle taken to a reputable repair facility that is capable of engine performance diagnostics and have them run tests for these codes. The gasket you mention is most likely a valve cover gasket not the head gasket and would not cause these codes. Although you should have this leak fixed before it becomes a problem.

Hope this helps..

Posted on Apr 20, 2009

  • Robert Lloyd
    Robert Lloyd Dec 29, 2013

    its water coming out from water oump area

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May be oil feed to cylinder head replace gasket

Posted on Apr 20, 2009

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