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Old 02-07-2006, 05:04 PM
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nismowu nismowu is offline
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Re: Fault code PO171 system too lean

Quote:
Originally Posted by ffwv
I will check the air flow meter, once I find out where it is and how to check it. It could be that one of the O2 sensors are hooked up wrong. I didn't do the work, they were done by the used car dealer that I bought it from. Thanks for the ideas!!
The sensor is between the intake box and the throttle body.
Very easy to find, it's connected with a 4 wire harness.
To do a basic check, start the engine, keep it running at idle speed
under warm-up condition.
Now the voltage of the green wire on the MAF sensor should be
approximately 1.3~1.7V
measure it again with engine running @ 2500 rpm
it should give u approximately 1.8~2.4V
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