![]() These are simple tests you can do to help diagnose a bad MAF without having to take the car to the dealer or anyone else. If it holds fine while cruising and climbing a hill on the highway, the MAF is probably OK. In this case you'll notice the set speed slowly dropping off and you'll be wanting to nudge the set speed upward. How well does the car hold speed on the highway with cruise control on while climbing a hill? One early sign of a dying MAF is the cruise control won't be able to hold the car at the set cruise speed while climbing the hill. A good MAF will allow the engine to rev to 5100 RPM easily. Difficulty starting can be a symptom of a poor MAF sensor. With a dead or very sick MAF, the engine won't be able to reach the RPM limiter at 5100 RPM. The last of the 7 Symptoms of Mass Air Flow Sensor is car engine hart to start. Mass Air Flow Sensor Replacement Cost Comparison Your Mechanic Work. ![]() The prices vary based on where you go for servicing and what kind of car you have. The labor should cost you around 60, while parts are about 240. ![]() If power and performance goes away with the MAF unplugged.MAF OK.Īnother test you can do is put the car in neutral and slowly press the go-pedal to the floor. To get your mass air flow sensor replaced, you will pay about 300, on average. If power and performance improves with the MAF unplugged.BAD MAF.replace. The ECU will automatically use a default value for MAF readings. It may set a Check Engine Light (CEL) code due to it being unplugged but don't worry about it. Try unplugging the MAF (not "MAS" BTW) and drive around with it unplugged and see if performance improves at all.
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