Disconnect the air flow sensor & see what happens We hope you find the p0171 code causes and fixes guide helpful This will put the car in a default mode.
2020 BMW M340i with 19x8.5 35 Rohana Rfx11 and 255/35R19 Continental
Speaking from experience i am willing to bet that p0171 (and/or) p0174 are a result of faulty oxygen sensors
If you have over 100,000 miles on.
While a dtc p0171 may not cause immediate engine failure, it can lead to poor engine performance, reduced fuel efficiency, and potential damage to the. In this video, we explain the bmw fault code p0171, its causes, and how to fix it yourself P0171 and p0174 together mean the engine is running lean on both banks, so it’s not just one side — it’s something affecting the whole fuel or air system In this kind of situation, it’s often not that the pump.
