Can a bad mass air flow sensor cause your car not to start?

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asked Aug 13, 2018 in Other-Cars/Transportation by acidicwithpanic (1,060 points)
Can a bad mass air flow sensor cause your car not to start?

2 Answers

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answered Aug 13, 2018 by Amos321 (5,590 points)
Yes a bad mass airflow sensor can cause a vehicle to not start because the mass airflow sensor controls the ignition timing, air/fuel mixture ratio and a lot more.

When the mass airflow sensor can't detect and control the Ignition Timing and Air/Fuel mixture ratio it can cause the cars engine to not start.

Having a properly working mass airflow sensor is essential to a properly running vehicle and for it to start.

Your cars engine needs the proper fuel to air ratio and ignition timing to start.
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answered Jul 20, 2022 by Wenja921 (26,070 points)
A bad MAF sensor can cause too much fuel to be left in the combustion chamber, creating untimed detonations.

You'll experience this as poor drivability such as hesitations or sudden jerking motions, particularly during acceleration.

A bad MAF sensor can cause your vehicle to experience poor drivability issues such as engine stalling, jerking or hesitation during acceleration.

This could happen while speeding up on the highway on-ramp or cruising down a city street.

These issues can create dangerous situations causing accidents and injury.

A bad mass air flow sensor can cause problems such as engine hesitation, engine stalling, engine running rich, lack of power, poor accelerating, hard starting or no starting.

The mass air flow sensor controls the fuel to air mixture ratio and lets the computer know how much fuel to send through the injectors when it's needed.

The bad mass air flow sensor may cause too much fuel to get through the injectors and cause the engine to run too rich.

If you unplug the mass air flow sensor and the engine runs better then the mass air flow sensor is likely bad and needs replaced.

You could drive with a bad mass air flow sensor but it's not recommended to do so.

If you drive with a bad mass air flow sensor your car or vehicle will likely stall, run lean under load or run rich at idle and your vehicle will use more fuel and your engine will lose performance.

A proper working mass air flow sensor is essential to a properly running and fuel efficient engine.

Getting your mass air flow sensor replaced will make your car run much better, improve your fuel mileage and your car will have more horsepower as a result.

To clean a mass air flow sensor on your vehicle carefully remove the mass air flow sensor from the throttle body and disconnect the electrical connector the mass air flow sensor as well.

Then spray the mass air flow sensor around 15 times and then let it sit for awhile to allow the Mass Air Flow sensor cleaner to work but don't scrub the mass air flow sensor as it could be damaged.

Then you can put back together and it should run better with a clean mass air flow sensor.

You could drive with a bad mass air flow sensor but it's not recommended to do so.

If you drive with a bad mass air flow sensor your car or vehicle will likely stall, run lean under load or run rich at idle and your vehicle will use more fuel and your engine will lose performance.

A proper working mass air flow sensor is essential to a properly running and fuel efficient engine.

Getting your mass air flow sensor replaced will make your car run much better, improve your fuel mileage and your car will have more horsepower as a result.

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