2004 FORD F-150 CODE SAYS LEAN ON BANK 2

  • Tiny
  • Peanuts54
  • 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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Friday, August 16th, 2013 AT 7:05 AM

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  • Tiny
  • Wrenchtech
  • EXPERT
  • 20,568 POSTS

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.

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Friday, August 16th, 2013 AT 7:59 AM

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