What should maf sensor read at idle
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indication that another sensor, like the throttle position sensor or the rpm input signal is contradicting the MAF signal. The cause might be the other sensor or signal being out of adjustment or faulty. 5. A code that indicates a low MAF signal may be set by various problems. These include the following: 1. A bad MAF sensor (internal fault) 2. Mass Air Flow (MAF) Sensors The Mass Air Flow Sensors converts the amount of air drawn into the engine into a voltage signal. The ECM needs to know intake air volume to calculate engine load. This is necessary to determine how much fuel to inject, when to ignite the cylinder, and when to shift the transmission.
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This vehicle should be pushing 25 times as much air at idle. I wouldn't trust that scan devise. Foxwell reader tested this time. It does not show the U0D00 code. The MAF still reads zero and the LTFT -14.1. Since my primary issue is getting the car to pass its drive cycle test: Anyone know how to...Answer (1 of 6): There's probably something wrong with it. If you disconnect it, you'll light up some engine lights. I had a bad maf sensor. I had to buy a hz measuring voltmeter. I still don't know what a hz is, but the sensor was not producing the right signal. Every once in a while my truck wo...