Q: how would an engine run if a mass air flow sensor signal was too low?

asked by on January 11, 2018

how would an engine run if a mass air flow sensor signal was too low/high?

A mass air sensor with low output voltage may cause loss of power, hard starts or rough running.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Idles very rough when heater/defroster is on

Hello, thank you for writing in. The vehicle is put under extra load when the climate control is turned on. The engine is impacted different ways by the different systems. Typically when the defroster is turned on, it uses the...

ford focus mk2 2.0 car idle rough and have no power.change.put feet on brake padel-car goes limp mode. 2005 Ford Focus

Hello - check first for problem codes, whether the Check Engine light is illuminated or not. The change in rough running behavior when you press the brake pedal may indicate a failed brake booster. A ruptured diaphragm in the booster...

My car is cutting out it is an 02 impala and it seems like it is starving for gas. I have replaced the mass air flow sensor, plugs

You should first scan the computer for codes. Diagnose any codes received. The problem sounds like a clogged fuel filter. Replace it if it has not been replaced.Then it can be the camshaft or crankshaft sensors on this engine. ...

Rough idle and SEL is flashing. I've replaced all 6 plugs and coil packs. The car still has a rough idle and no power.

Misfiring can be caused by lack of spark or lack of fuel. If the same cylinders are still showing codes for misfiring after replacing the coils, the problem can lie elsewhere. If it is the coils not firing, there can...

Car runs rough, stalls, makes grinding noise - 1996 Chevrolet Corsica

Rough running can have many sources related to fuel supply, ignition misfire, dirty air intake sources, etc. Checking problem codes will instruct what components to examine next, as well as the grinding noise you noticed. I recommend having an expert,...

Do I need a crankshaft position sensor

Typically a bad crank position sensor will prevent your vehicle from starting. Your rough idle could be due to a vacuum leak or possibly a dirty injector, or maybe even an idle air control valve or throttle body that needs...

Car idles rough, extremely weak and stalls when put into gear

Hello. This can be caused by a number of things. I usually start by scanning the computer for codes. This will let me know if the computer is seeing any issues. If there are no codes then I take a...

Car loses rpms when idling and dies when not giving it gas on first run.

Hello. It may be a problem with the choke on the carburetor. Try some carburetor cleaner in and around the carburetor, especially the choke plate. On a cold start no matter the temperature, the choke plate should be mostly closed....

My Jaguar XJ8 is running extremely rough

Being that your car is running better with the MAF disconnected, I say replace your MAF. Most cars would shut off without the MAF connected. If you need a technician to scope out the problem in person, a certified professional...

Related articles

How Long Does a Timing Chain Last?
A timing chain is a metal chain, as opposed to the timing belt which is made of rubber. The chain is located...
P0079 OBD-II Trouble Code: Exhaust Valve Control Solenoid Circuit Low (Bank 1)
P0079 code definition Exhaust Valve Control Solenoid Circuit Low (Bank 1) What the P0079 code means P0079 indicates an issue that is...
Understanding the Smart Car Service Interval Indicator System
Car symbols, or dashboard lights, are a car service reminder. The Smart Car Service Interval Indicator System tells you when your car needs service.