Originally posted by karter:
..replaced the gaskets myself. Three days later the same code came back on.
Got a free check engine coupon from a different dealer and he told me that the intake manifold needed removed so they could clean the egr passiges. ...
Did you torque the bolts to specs when you reinstalled the UIM/LIM?
Autozone and Advance Auto does free scanning (although it is more of a code read rather than a real time scan).
From TSB,
P0171 - System Too Lean (Bank 1) The Adaptive Fuel Strategy continuously monitors fuel delivery hardware. The code is set when the adaptive fuel tables reach a rich calibrated limit.
Fuel System:
�· Contaminated fuel injectors
�· Low fuel pressure or running out of fuel (fuel pump, filter, fuel supply line restrictions)
�· Vapor recovery system (VMV)
Induction System:
�· MAF contamination
�· Air leaks between the MAF and throttle body
�· Vacuum leaks
�· PCV system concern
�· Improperly seated engine oil dipstick
EGR System:
�· Leaking gasket
�· Stuck EGR valve
�· Leaking diaphragm or EVR
Base Engine:
�· Exhaust leaks before or near the HO2S
�· Secondary air concern
Powertrain Control System:
�· PCM concern
Last edited by Tony2005; 04/05/06 09:32 PM.
