98 Explorer - System Adaptive Fuel too Lean
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98 Explorer - System Adaptive Fuel too Lean
I got two ODBII fault codes today - P0171 and P0174 - System Adaptive Fuel too lean (Banks 1 and 2). It sounds like a common fuel or air control element is the problem.
I had a new fuel pump installed a couple of months ago, and that seems to be working OK. Vehicle starts and runs well, and has good power.
So what should I try first - fuel filter, Mass Airflow sensor, upstream O2 sensor...something else???
Can someone give me some advice on what the most likely cause is?
Thanks,
kiteman
I had a new fuel pump installed a couple of months ago, and that seems to be working OK. Vehicle starts and runs well, and has good power.
So what should I try first - fuel filter, Mass Airflow sensor, upstream O2 sensor...something else???
Can someone give me some advice on what the most likely cause is?
Thanks,
kiteman
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