Would a fluctuating long term fuel trim readout indicate a sensor problem in a P0171/174 lean code? | E46 Fanatics Forum
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engine - Why Long Term Fuel Trims Remains in Negative? - Motor Vehicle Maintenance & Repair Stack Exchange
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STFT and LTFT - Bimmerprofs.com | NOx emulator NOXEM 129 | 130 | 402 developed for BMW N43 & N53 series engines
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