p0101
Easy Fix
Mercedes-Benz · SUVs
Mass Air Flow Sensor Circuit Range/Performance Problem
Quick Answer
Error code P0101 on your Mercedes-Benz SUVs means: Mass Air Flow Sensor Circuit Range/Performance Problem. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
X243X247X254V167X167AMG GLB35 4MATIC 2024AMG GLC43 4MATIC 2024AMG GLC63 S 2024AMG GLE53 4MATIC+ 2024AMG GLE63 S 2024AMG GLS63 2024EQB 250+ 2024EQB 300 4MATIC 2024EQB 350 4MATIC 2024GLB250 2024GLB250 4MATIC 2024GLC300 2024GLC300 4MATIC 2024GLE350 4MATIC 2024GLE450 4MATIC 2024GLS450 4MATIC 2024GLS580 4MATIC 2024Maybach GLS600 2024
Likely Causes
How to Fix It
1
Inspect the air filter for excessive dirt and ensure proper installation
2
Clean the MAF sensor element carefully with approved MAF sensor cleaner
3
Check the intake duct between the MAF sensor and throttle body for cracks or loose clamps
4
Compare MAF sensor readings at idle and under load to known-good values
5
Replace the MAF sensor if cleaning does not restore proper readings
Pro Tip
This is a common issue that most users can resolve without specialized tools. Try the first step before moving on to more complex solutions.
Parts You May Need
MAF sensor
Air filter
MAF sensor cleaner
Intake air duct
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