Truck threw both lean codes the other day. Reset them and it came back on a day later so Im thinking MAF, fuel pump/filter, O2 sensors, vacum leak?
I replaced the O2 after the cat a year ago, and have a fuel filter i need to throw in it. Gonna give the MAF a clean and see if it helps.
Anything I should check that I haven't mentioned?
Bank 1 & 2 Lean Codes
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paintballrocker
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Bank 1 & 2 Lean Codes
[size=75]2002 CC, westin push bar with 2 lights, bed cover, custom made cat-back exhaust.......soon a steering stabilizer mod, lift, sounds system[/size]
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HenryJ
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Re: Bank 1 & 2 Lean Codes
Sounds good. Maybe a fuel pressure test (pump, injectors, regulator) , if possible?
"Speed doesn't kill, suddenly becoming stationary does." - Richard Hammond
"Speed is just a matter of Money - How fast do YOU want to go?"-Mechanic from Mad Max-
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paintballrocker
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Re: Bank 1 & 2 Lean Codes
found the EGR return line to the intake popped off and replaced the up stream 02 sensor right before that. no code now for a week!
[size=75]2002 CC, westin push bar with 2 lights, bed cover, custom made cat-back exhaust.......soon a steering stabilizer mod, lift, sounds system[/size]
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HenryJ
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Re: Bank 1 & 2 Lean Codes
Nice 
"Speed doesn't kill, suddenly becoming stationary does." - Richard Hammond
"Speed is just a matter of Money - How fast do YOU want to go?"-Mechanic from Mad Max-
If at first you don't succeed - Don't take up Skydiving! - ThunderII KE7CSK