Diesel Intake Air Flow A Control System - High Air Flow Detected

Check these first

• Intake air flow A flap stuck open letting in too much air
• Dirty or failed mass airflow sensor overreporting air
• Intake leak downstream of the air flow A flap
• Air flow A actuator out of calibration
• Wiring fault in the air flow A control circuit

What to do next

1. Read mass airflow and air flow A position live data
2. Command the air flow A flap and watch it respond
3. Smoke-test the intake for leaks after the flap
4. Clean or replace the mass airflow sensor if readings are off
5. Recalibrate or replace the air flow A actuator
6. Clear the code and retest

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