Definition: fuel trim bank one condition
Explenation: The powertrain control module uses the oxygensensor to calculate the air/fuel ratio of the engine. The computer has recognized a rich or lean condition on one engine bank only.
Probable causes: 1 If bank one and two codes set together suspect fuel pressure or mass air flow sensor.
2. Oxygen sensor defective
3. Ignition missfire-repair
4. Fuel injector problem
trouble shooting: the pcm has determined that during testing, the fuel system for bank 1 was to lean. (Bank 1 identifies the location of cylinder #1, while bank 2 identifies the cylinders on the opposite bank)
I had a new mass air flow sensor from granatelli that are supposed to flow more air and give more power but instead I got less power. But I have just put the stock mass air flow sensor back but the service engine light is still on. What do u think is the problem is it the mass airflow sensor that messed it up or oxygensensor or something else?
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Thursday, November 22nd, 2007 AT 10:33 AM