only in the morning when van first starts, engine will not run smoothly, will hesitate and when apply pressure to gas pedal, engine will hesitate... almost seems like catalytic converter clogged .. has same symptoms but i know that is not it because when car warms up, it runs fine. already changed fuel pump.. was not the cause. have 3 error codes as follows
P1374- 3x reference circuit
P0171- fuel trim system lean (bank 1)
P0420- catalyst system low efficiency
i have done extensive research on these codes and know that either
**my o2 sensor could be dirty/damaged
**mass air flow sensor dirty
please help!!?? i read about people in exact same situation that spent $2000 to fix vehicle and was only a $100 problem at the end.
P1374- 3x reference circuit
P0171- fuel trim system lean (bank 1)
P0420- catalyst system low efficiency
i have done extensive research on these codes and know that either
**my o2 sensor could be dirty/damaged
**mass air flow sensor dirty
please help!!?? i read about people in exact same situation that spent $2000 to fix vehicle and was only a $100 problem at the end.
Jan 16, 2009 at 12:50 PM