What it means
The control module detected a high electrical signal in the diesel intake air flow control circuit.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
The diesel intake air flow control actuator adjusts an intake flap to help manage airflow into the engine. The control module monitors the circuit signal and sets P02E6 when it is higher than the expected range, which can point to a signal wire shorted to voltage or a faulty sensor, actuator, or module.
Common causes
Most likely first.
- Intake flow control position sensor fault
- Signal wire short to voltage or poor connection
- Actuator or control module fault
Symptoms
- Check-engine light on
- Reduced engine power or sluggish acceleration
- Rough idle or stalling
- Increased fuel consumption
How to diagnose it
- Read freeze-frame data and live intake flow control position data to see when the high signal occurs and whether the reported flap position makes sense.
- Inspect the intake flow control position sensor, actuator connector, and nearby wiring for loose plugs, corrosion, damaged insulation, or a wire contacting a voltage source.
- Check the sensor signal, supply, and ground circuits against the manufacturer's wiring information to find a short to voltage or poor connection.
- Compare commanded and reported flap positions with a scan tool, if supported, to see whether the actuator responds despite the high signal.
- Test the position sensor and actuator using the manufacturer's procedure before considering a control-module fault.
Common fixes
- Reconnect or repair a loose, corroded, or damaged sensor connector.
- Repair a signal wire shorted to voltage or a poor circuit connection.
- Replace a faulty intake flow control position sensor.
- Replace a failed actuator or, after circuit checks, repair or replace the control module.
Can I keep driving?
If the engine runs smoothly and power is normal, a short, cautious trip to a repair location may be reasonable. Avoid hard acceleration; reduced power, stalling, or continued driving with poor combustion can make the vehicle unsafe and increase emissions.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.