1996 MUSTANG: failed emissions... P0174 OBD-II Trouble Code...System Too Lean (Bank 2)

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06-17-2006, 05:57 PM

bandit1

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Join Date: Jun 2006

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1996 MUSTANG: failed emissions... P0174 OBD-II Trouble Code...System Too Lean (Bank 2)

Hi. My sister has a 1996 MUSTANG GT V8 4.6 281. It failed emissions. The technician indicated a "P0174 OBD-II Trouble Code...System Too Lean (Bank 2)". What does this mean? What might cause this problem? What might be required to fix the problem? How much might it cost to repair?

Thank you,
Tom

06-20-2006, 03:22 AM

drw0392

Join Date: Sep 2005

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Posts: 158

RE: 1996 MUSTANG: failed emissions... P0174 OBD-II Trouble Code...System Too Lean (Bank 2)

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ORIGINAL: bandit1

Hi. My sister has a 1996 MUSTANG GT V8 4.6 281. It failed emissions. The technician indicated a "P0174 OBD-II Trouble Code...System Too Lean (Bank 2)". What does this mean? What might cause this problem? What might be required to fix the problem? How much might it cost to repair?

Thank you,
Tom

Too lean means you're fuel to air/ fuel ratio doesn't contain enough fuel. Look for pluged fuel injectors. I'd run a bottle of fuel injector cleaner through it and replace the fuel, and air filter.

01-02-2007, 10:00 PM

cobra79

Join Date: Nov 2006

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Posts: 59

RE: 1996 MUSTANG: failed emissions... P0174 OBD-II Trouble Code...System Too Lean (Bank 2)

I would make sure the engine is reaching proper operating tempature. also look for a vacuum leak , low fuel pressure, bad injector. pull the plugs on that side of the engine and look for one that has been running lean.If you find one that is very light in colortake a compression test on that cylinder. Good luck