P02E4
Diesel Intake Air Flow A Control Stuck Open
Diesel intake throttle A is mechanically stuck open — anti-shudder function on shutdown will not work and DPF regen airflow control is lost.
Diesel intake throttle A is mechanically stuck open — anti-shudder function on shutdown will not work and DPF regen airflow control is lost.
Common causes
- high
Carbon buildup or broken return spring
One of the most commonly reported causes for this code — check this first.
Typical part cost: $90-770
- low
Carbon or debris buildup preventing free movement
Less common, but worth ruling out after the more likely causes.
Typical part cost: $90-770
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P02E4 mean?
P02E4 means "Diesel Intake Air Flow A Control Stuck Open". It is a generic OBD-II code that points to a fault in the fuel & air metering (injector circuit).
What are the most common causes of P02E4?
carbon buildup or broken return spring; carbon or debris buildup preventing free movement; component wear with age - mechanical play — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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