could have swore this car gave me a p0171 before, but now its a p0172. Background - i'm off this car in Minnesota, and driving it home started missing real bad, and then wouldn't start at all period. Gave me fuel tank codes, and I discovered that the fuel filler pipe had rusted through. It had only started missing once we hit a heavy rainstorm, so I assumed it had water in the tank and no I swapped in another tank, and it started and ran good. But, after ~20m I got a CEL I think a p0171, but could've been the p0172. I replaced the MAF and no difference. Today, I replaced all the injectors and now get the p0172 immediately. Clear it and it immediately resets. Any suggestions? The coolant temp is normal after warming up. Strange - it was getting bad mileage - mid-30s mpg, but after the new injectors, the mpg gauge is crazy, running 80mpg. If its running rich, I'd think it'd have low mpg, not super high. This car is sold but I need to get rid of this code for the buyer. Any suggestions appreciated.
I got curious about this and did a search; this came up: Diagnosing Automotive Codes P0171 and P0172: Causes and Solutions – Auto Repair Procedures. Doesn't sound like a whole lot of fun, especially if you're on the road. Good luck, and let us know how it turns out.
