P0174 System Too Lean (Bank #2)
P0171 System Too Lean (Bank #1)
System to lean means that a fuel injector or injectors may be plugged up, or the oxygen sensor is sensing too lean of a condition.
How many miles do you have on this engine?
Have the O2 sensors ever been changed?
When was the last time you had a tune up?
Intake bonit (Rubber coupler that connects Throttle body to intake manifold) it will develop a tear and allow air to get sucked into engine past the sensor point and ECM doesn't know how much gas is needed. the Part is cheap like $63 or less the labor is 2.3 hours and means it will cost about 400-600 to fix at a dealership
I think that you may have a point there. That labor cost can be daunting.
Quaestion I replaced the Plenum and gasket as well as the intake gaskets a week ago, codes cleared and car ran great for about 150 miles, then codes 0170 & 0174 came back on and car running bad again, I am not sure where to go from here.
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