Air Flow Restriction / Air Filter Restriction
The ECU detects an excessive intake restriction. Either the air filter is heavily clogged or an obstruction in the intake duct is reducing airflow below the expected level.
Affected components
- Air filter
- Intake duct
- Mass air flow sensor
Common causes
- High likelihood: Clogged air filter element
- Medium likelihood: Foreign object in intake
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.