P02E7Diesel Intake Air Flow A Position Sensor Circuit Range/Performance
- 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. P02E7 is the position plausibility fault. GM's 6.6 litre LML implements it through position control: target and actual position differ by more than ±10 % for 10 s, two trips; newer GM diesels report the same as P02E1. It can mean a sensor reporting a wrong position as well as a stiff valve. 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 on
- Often no noticeable change
- Filter regeneration does not run, soot load rises
- Likely causes
- LikelyValve stiff or coked
- PossiblePosition sensor drifting
- PossibleContact resistance in the sensor connector
- RareGear play
- 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: €50 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.