Further research shows that the code means that the MAF is over-reporting the amount of air getting into the engine. As an example, the MAF is telling the ECU that the air flow rate is 0.4 grams per second, while the actual amount of air entering the engine is 0.32 grams per second. Odd that this could be related to s vacuum leak! I’ll dig up more info (schematic) later today. The MAF is wired to the DME, there is a fuse in the 12 volt line that powers the MAF. However this F3 fuse in the DME box also powers the cam sensors, the crank sensor, and the t-stat heater. I suspect your BlueStreak is the problem. The most common signs of bad mass air flow sensor (MAF) in BMW X3 are loss of power or slow acceleration, engine hesitation or jerking during acceleration, erratic idling, misfires, poor exhaust emission values and sometimes black smoke comes out of the tailpipe. The mass air flow sensor is part of the engine’s intake system and is located The P115C code relates to the MAF (Mass Air Flow) sensor and a reading of air flow that is lower than expected. This means that either that the sensor itself is reading incorrectly or you have an issue with intake system not flowing enough air/leaking after the MAF. There are a few things that can cause this. (20A) Mass air flow sensor, crankshaft position sensor, reverse lamp (s) relay, coolant thermostat, camshaft position sensor 1, camshaft position sensor 2 – 320i / 325i / 330i: F4 (30A) Fuel pump relay, exhaust air pump relay, A / C compressor clutch relay – 316i / 318i / 330i: F5 (30A) Ignition coil relay – 316i / 318i / 320i / 323i / 328i 2004 bmw 330i. My 2004 bmw 330i currently has the following code: 2783 Hot-Film Air-Mass Flow Sensor and also has transmission warning light on. the car jerks when slowing down around 2k rpm. It is currently at a mechanic shop.The mechanic found various vacuum leaks coming from upper and lower intake boots so those were replaced as well as the Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST. 1 (855) 347-2779 · hi@yourmechanic.com. Read FAQ. GET A QUOTE. P0102 Trouble code definition Mass Airflow (MAF) Circuit Low Voltage Input The code P0102 code is often associated with P0100, P0101, P0103 or P0104 trouble codes 29206 posts · Joined 2006. #6 · Nov 28, 2013. In almost all cases here a MAF code doesn't indicate that the MAF is badit indicates an air leaka broken vac hose, intake boot, gasket on DISAthat sort of thing. It could be just dirtysometimes the connector gets messed up and guys have 'recrimped' the tabs in the connectors, but it's The price of car parts within the category Air flow sensor for BMW 3 Series E46 ranges from £32 to £182, depending on the manufacturer and product specifications. 【TOP DEAL】⚡️ Mass air flow sensor for BMW 3 Saloon (E46) from 1998 MY from various OEM part manufacturers. Huge brand selection at low prices Air flow meter for BMW E46 . The mass air flow sensor measures the air mass flowing into the engine intake. Measuring air mass is critical in calculating how much fuel to add to achieve the correct air-fuel ratio (AFR). The ideal AFR is 14.7:1 (14.7 pounds of air to 1.0 pounds of gasoline), but real-world AFR varies. GN7nte.