Diagnostic Trouble Code (DTC) P0101 indicates a problem with your vehicle’s MAF sensor. Follow along as we further discuss the severity of fuel & air metering DTCs BMW Diagnostics with ISTA - How to reset mass air flow MAF adaptation values with ISTA D.The information contained on this video are for educational and info P0101 is a diagnostic trouble code (DTC) for "Mass Airflow (MAF) Circuit Operating Range or Performance Problem". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine

2) When I drove the day after fixing the lean condition, my idle was already at -25% rich, and when I accelerated I saw that it peaked up to > -50% rich, and this triggered the P0101 code and threw the tranny into limp. 3) My new OEM VDO MAF arrived, so I swapped that out and drove around, car was still in limp mode.

S. ssm1991. 858 posts · Joined 2007. #2 · Mar 26, 2008. For sensors always go OEM, whether it's camshaft sensors, crankshaft sensors, wheel speed sensors, MAF, oil temp, water temp, etc. A lot have experienced aftermarket ones that just gave trouble. I got my MAF from Pelican Parts because they had mine plenty in stock.
Follow These Tricks! 3. Engine idles roughly or halts. These are the bad MAF sensor symptoms that indicate that the sensor is completely out of order. In that case, the car’s computer cannot control the fuel-to-air ratio because the sensor does not send any information to it. As a result, the engine either halts or idles roughly.
The mass airflow sensor is used #mass_air_flow_sensor #MAF_sensor #MAFIn this video we will look at 8 symptoms that will tell mass flow sensor is going bad.
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    • bmw e46 mass air flow sensor problems