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Fuel and air

P0101 Mass air flow sensor reads wrong

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P0101 means: Mass air flow sensor reads wrong. The mass air flow sensor reports a different amount of air than the engine computer expects. Drive gently and have the car checked soon. The repair usually costs about €60–300 in Estonia. The most common cause: MAF sensor is dirty or old.

Is it safe to drive?Get it checked soonDrive gently and have the car checked soon.
Typical repair cost€60–300parts and labour in Estonia

What it means

The mass air flow sensor reports a different amount of air than the engine computer expects. The engine may feel weak and go into limp mode.

What could be wrong

  1. 1MAF sensor is dirty or old
  2. 2Air leak after the sensor
  3. 3Clogged air filter
  4. 4On diesels, an EGR valve stuck open

What you can check yourself

Check the air filter and hoses. Don't clean the sensor with carb cleaner, it will ruin it. You can check the simple things yourself, but the repair is best done in a workshop.

How we fix it

  1. We compare the sensor reading on a test drive
  2. We check for air leaks and the EGR
  3. We replace the MAF sensor

Standard SAE description: Mass or Volume Air Flow Circuit Range/Performance

Want a definite answer?

Bring the car to our workshop in Estonia for diagnostics. We read the fault codes, test the sensors and tell you what is wrong and what the repair costs before we start any work.

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Questions

What does fault code P0101 mean?

Mass air flow sensor reads wrong. The mass air flow sensor reports a different amount of air than the engine computer expects. The engine may feel weak and go into limp mode.

Can I drive with code P0101?

Drive gently and have the car checked soon.

How much does it cost to fix P0101?

Roughly €60–300 in Estonia. The price depends on exactly what has failed and on the car.

How is P0101 fixed?

We compare the sensor reading on a test drive. We check for air leaks and the EGR. We replace the MAF sensor.

Related codes

P0068Air flow doesn't match the accelerator positionP0087Fuel pressure too lowP0088Fuel pressure too highP0089Fuel pressure regulator can't hold pressure steadyP0093Large leak in the fuel systemP0191Fuel pressure sensor reads wrongP0230Fault in the fuel pump power supplyP0627Fault in fuel pump control

This information is general and prices are approximate (Estonian workshop rates). The same code can mean different things on different cars. Only an inspection of the car gives a definite answer.

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