P2D8CFan 2 Control Module Supply Voltage Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2D8C concerns the supply circuit of the fan 2 control module. The engine controller registers that the module does not get proper operating voltage, whether through an open or high-resistance feed, a blown fuse, a poor ground or a reported voltage outside its window. Porsche lists P2D8C in the DME of the 718 GTS 4.0, GT4 and Spyder from model years 2021 to 2023 as radiator fan 2 (right), power supply. Bulletin 198/22 traces the joint appearance with P2D89 to a software error during control unit start-up and fixes it with a DME update; the fan then failed now and then, the air conditioning lost performance and an engine control warning could appear. Before condemning a fan, measure the voltage drop at the module under load. Fan 1 has P2D89, internal faults of the module are P2D8B.
- What you may notice
- Second radiator fan fails now and then
- Air conditioning loses cooling power
- Engine control warning displayed
- Likely causes
- LikelyBlown fuse or high-resistance supply line to the fan 2 module
- PossibleEngine control software error at start-up (Porsche 198/22)
- PossibleLoose or corroded ground connection
- 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 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.