P0171 Problems
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P0171 Problems
Hey All -
Very frustrated old man here.
My base '99 V70 keeps throwing the P0171 code at me (lean - bank 1). I know the main 3 culprits of this are a vacuum leak, the upstream 02 sensor, or a dirty/malfunctioning MAF sensor.
So I've searched high and low for vacuum leaks, and come up with nothing (the only think I haven't done is had the engine smoked). I swapped out the MAF sensor with one from a salvage yard (I know it's remotely possible that it's bad too, but the car is running perfectly). And earlier this week I replaced the upstream O2 Sensor with the right Denso part.
After driving for about 75 miles, the CEL came back on, and I again have the P0171 code. Same old same old.
Other than the drop in mileage, the car seems to be running perfectly.
Any great ideas?
Very frustrated old man here.
My base '99 V70 keeps throwing the P0171 code at me (lean - bank 1). I know the main 3 culprits of this are a vacuum leak, the upstream 02 sensor, or a dirty/malfunctioning MAF sensor.So I've searched high and low for vacuum leaks, and come up with nothing (the only think I haven't done is had the engine smoked). I swapped out the MAF sensor with one from a salvage yard (I know it's remotely possible that it's bad too, but the car is running perfectly). And earlier this week I replaced the upstream O2 Sensor with the right Denso part.
After driving for about 75 miles, the CEL came back on, and I again have the P0171 code. Same old same old.
Other than the drop in mileage, the car seems to be running perfectly.
Any great ideas?
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