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Re: '98 3.8L Check Engine Light P0174
Don't change the O2 sensor just yet.
P174 Indicates a lean condition on one of the two banks (P171 is the sister code for the other bank).
It could be an O2 sensor but it could actually be a lean condition due to an intake leak or a faulty Fuel injector.
It could also be that the 171 code is waiting to appear or you have low fuel pressure.
Investigate a litlle more. I think O2 sensors are blamed far too often usually they are only the messengers.
Last edited by DRW1000; 05-21-2005 at 07:52 AM.
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