Mechanics

CODE SAYS LEAN ON BANK 2

2004 Ford F-150 • 90,000 miles

Service engine light on indicating lean on bank 2. What is the most likely cause? Oxygen sensor? Which side, which one? Or something else? I have been told just start replacing the sensors but that is crazy, waste of money. Could it be a vacuum problem? I doubt an injector pressure problem as I believe it would be both sides, am I wrong?
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Peanuts54
August 16, 2013.



Bank 2 is the drivers side. I would look for any vacuum or exhaust leaks first but since it's only one bank, it MAY be a bad sensor.

Wrenchtech
Aug 16, 2013.