Mass Air Flow Sensor (MAF) Fault Symptoms & Problems

The Mass Air Flow Sensor (MAF) measures the levels of air entering the engine through the intake system. The readings from the sensor are passed to the ECU (Engine Control Unit aka the car's brain!). The ECU will use this information so that it can calibrate the amount of fuel that it needs to inject via the fuel injectors.

The fuel/air levels are constantly tweaked by the ECU based on the input from the MAF sensor. If for some reason the MAF sensor is not sending the correct readings then the engine will behave erratically as it will be operating with an incorrect fuel / air mix.

MAF sensors are prone to error when they get dirty. As a car ages there can be a build up on the sensor which can degrade its performance and affect the data it sends to the ECU. The sensor can be cleaned (quite often as a DIY job) to improve accuracy but sometimes they also fail and need replacing.
6 Symptoms of Mass Air Flow Sensor (MAF) Problems
We have 185 owner submitted problems mentioning the Mass Air Flow Sensor (MAF)

Showing the latest 10, see more problems here

2
responses
Engine missing

Engine stutters for 1 or 2 seconds in each year when changing up

2005 Ford Mondeo 1.8
Posted: Jul 20, 2021
1
response
MAF sensor inactive

Engine check light is on and code reader says that MAF is inactive

2008 Vauxhall Astra 1.8 life automatic
Posted: Jul 12, 2021
6
responses
1.9 dci idles normally and revs up normal but drive off and it starts jerking, accelerate and its ok but ease off and it starts jerking again

idles normally and revs normal but take off and it starts jerking, accelerate and its ok but when i ease of at steady sp...

2004 Renault Laguna 1.9dci
Posted: Jul 10, 2021
2
responses
Sometimes i lose power and no fault codes

Hi, i have a problem.with my vivaro from 2005, is 1.9. I changed maf, egr, map, both vacuum sensor, crank shaft sensor, ...

2005 Vauxhall Vivaro 1.9
Posted: Jul 6, 2021
2
responses
Car dies

I have an intermittent fault where my car dies at low speeds without warning but starts again after a few minutes i have...

2013 Vauxhall Meriva 1.4
Posted: Jul 4, 2021
2
responses
Cutting out

I bought the car in Jan 2020 so it hasn't had a lot of use due to lockdowns. Recently it's started cutting out and mis-f...

2016 Ford Fiesta Zetec 1242
Posted: Jul 2, 2021
2
responses
Rough idle

Car drives fine but when idle judders and sounds rough engine light is onwith an error code to do with the map sensor bu...

2011 Skoda Fabia 1.4 vrs automatic
Posted: Jun 23, 2021
1
response
Why does my car keep jerking then cut out

Showing no faults on diagnostic machine,battery only a Yr old via rac,spark plugs been changed yet still continues been ...

2015 Peugeot 208 1.2
Posted: Jun 16, 2021
1
response
Starts to hop when the rpm increases

If accelerating up to 100km it starts to hop and jerk, or if I am going up a hill. Revs jump around as it is doing it. H...

1995 Nissan Terrano R3M-R
Posted: Jun 10, 2021
3
responses
Jerking when cruising at about 30 mph

Changed plugs and put injection cleaner but does not cruise nice jerky

2017 Toyota Aygo 1.0
Posted: May 28, 2021
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