Here are the most common symptoms of a bad or failing MAF sensor: Idle Issues – Your GTO may run rich or lean when idling, or it may also idle erratically. A rich condition is when there is not enough air relative to the fuel in the air/fuel mixture. The exhaust color is usually darker when running rich. A lean condition is when there is too
2351 posts · Joined 2009. #1 · Sep 1, 2020. I was hoping someone out they may have had the same issue & can give me a testing process for the MAFS. I started getting the dreaded codes P0171 & P0174 Lean mixture banks 1 & 2 on my '05 E46 330ic with 93k miles. Here's the long story: My starter was going bad, so I replaced it with a new Bosch
A Mercedes Benz’ mass air flow sensor’s main function is to measure both the amount and temperature of air coming into the engine. The obtained measurements help the fuel injection system of the engine by communicating the information to the board computer, so the computer calculates and decides the mixing ratio of fuel to air for proper
In "general" terms most of the MAF readings on these car at idle are around 4 Grams/Sec. BUT MAF readings are all over the place, at idle there may not be much variation. Most bad MAF's "under report" by as little as 5-15% which is a very small difference to be able to properly detect.
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The 03/2003 and later E46 use the 6 pin MAF connector. The MS45 ECM gets the Intake Air temperature from the MAF, the earlier MS42-43 ECM uses a temp sensor in the intake manifold. The M56 325 engine uses the same size MAF as the 330 models. Join the BMW Car Club of America.
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e46 mass air flow sensor symptoms
