P2EACActive Radiator Air Flow Control Module A Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2EAC is the general performance fault of module A: the module can be reached, but the flap system does not do what it is told. GM's check of the comparable smart shutter actuator on the 3.0 L diesel LZ0 shows the approach: a gap of more than 5 % between commanded and reported position starts repeated attempts to free the flaps, and only after a calibrated number of failed retries is the fault confirmed, type B with the MIL after two trips. A Chrysler patent application, US20130338870, names ice as a frequent reason and has the system try again once the temperature is above 0 °C. No manufacturer documents P2EAC publicly; Hyundai and Kia's US11225900 shows the flap hardware involved. Usual causes are frozen or blocked flaps, a broken linkage and a worn actuator.
- What you may notice
- Check engine lamp on, where the maker assigns a MIL
- Flaps do not open or close, sometimes only in frost
- Warmer engine under load or slower warm-up
- Likely causes
- LikelyFlaps frozen or blocked by debris
- PossibleBroken or detached flap linkage
- PossibleWorn gearbox or motor in the actuator
- 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: €0 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.