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1997 Mazda B4000 Question: check engine code with P153 code

 

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Visitor, Saint Johns, FL, June 20, 2011, 13:08

v6 4.0L engine with 105,000 miles. MAF was replaced 3 months ago, it runs fine except for marginal gas mileage. thanks for helping

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    DaveJHM June 20, 2011, 23:39
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     Master

    P0153 is bank 2 oxygen sensor issue. Check for air leaks. A diagnostic test needs to be performed to monitor oxygen sensor operation - check bank 2 verses bank 1 - see how they are switching.

    It may be that you need a bank 2 upstream oxygen sensor.

    This will also hurt your fuel economy...

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    Visitor, June 21, 2011, 09:48

    the light went out today, don't know what to think. thanks for your reply.

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    DaveJHM, June 21, 2011, 22:17
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    Oxygen sensor issues can come and go as drive cycles are continuously being updated, and this kind of code may indeed clear itself in time. Keep a sharp eye - the key to me is that your fuel economy is marginal...which in this truck you're lucky if you hit 15-18 on the highway...so is marginal 12-14?

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