P02EADiesel Intake Air Flow A Position Sensor Circuit Intermittent/Erratic
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- The diesel intake air flow valve A is the throttle flap ahead of the intake manifold of a diesel engine: it creates the vacuum needed for high EGR rates, lowers airflow to heat the particulate filter and catalyst during regeneration and closes at switch-off against run-on shaking. A spring holds it open when unpowered; an electric motor positions it, with a position sensor reporting back. P02EA reports brief dropouts or jumps of the position signal – loose contacts, a wire breaking under movement or faulty digital sensor messages. No manufacturer using P02EA was found – GM reports such faults under its own codes, Ford does not use it – so the description follows CARB's input monitoring requirement. On a fault the valve is switched off and the spring opens it: driving is usually little affected, but EGR control is restricted and filter regeneration may be blocked.
- What you may notice
- Check engine light (possibly intermittent)
- Valve occasionally switched off
- Irregular regeneration
- Likely causes
- LikelyLoose contact at connector or pins
- PossibleWire breaking under movement
- PossibleSensor with dropouts
- RareElectromagnetic interference
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.