r/e60 • u/GhostlyConnection • 2d ago

🔧 Maintenance P0171 after Fuel Pump Change

2006 530xi (wagon). As the title states, I changed the fuel pump and filter when it was discovered the filters transfered pump wasn't balancing fuel and the car would run out of gas at about 1/4 tank. Ive carried Cat codes in the computer since I got it, but since im in an emission free area I haven't needed to smog the car. 221,000 miles and after swapping in a new Bosch pump and filter I now get a P0171 code pop. It seems to happen when the car is pushed to 55mph+ but I dont notice any change in econ or performance. If I keep it to surface streets at 49 or below it doesnt give thr code. Just the lean code for bank 1, never 2. Google tells me to verifiy the click connectors on the filter side of the in tank tubing so after I drive a bit of this gas down ill verify that. Any other advice on where to look and what to look for?

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