P2D8AFan 2 Control Module Over Temperature
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2D8A is the second-fan twin of P2D87: the electronics that power fan 2 signal that they have reached their temperature limit. On cars with two radiator fans the second one usually sits on the other side of the shroud; Porsche, for instance, calls its right-hand fan number 2. No manufacturer publicly documents P2D8A. Since supplier modules such as those from Brose are specified for stable output only up to about 120 °C, heat soak in the engine bay after a hard run, a jammed motor pulling high current or clogged fins that starve the fan of air are the first suspects. CARB requires output devices to be checked for proper response, and a module that throttles itself no longer delivers the requested airflow. Expect higher coolant temperature in traffic and weaker air conditioning.
- What you may notice
- Second fan slows down or cuts out after long idling
- Coolant temperature climbs at standstill
- Air conditioning blows warmer
- Likely causes
- LikelyStiff or partly blocked fan 2 motor overloading its electronics
- PossibleHeat build-up around the module, e.g. clogged fins or damaged air guides
- PossibleDefective temperature sensing or power stage in the fan 2 module
- 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: €150 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.