P26FDA/C Compressor Internal Control Module Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- Electric A/C compressors in hybrids and electric vehicles carry their own inverter and control electronics. P26FD says this built-in module does not work as expected, as judged by the module that supervises the compressor. Audi documents the code for the 2016 A3 e-tron: the Climatronic unit J255 logs it instead of the engine module, and the MIL comes on purely as a network request. Bulletin 2047037/1 attributes it to a software error in the self-check of the refrigerant system and the compressor diagnosis; the cure is new Climatronic software, with the compressor replaced only if guided fault finding demands it. CARB requires monitoring of electronic A/C components whose failure affects emission control or other monitors. Cooling may still work or be limited.
- What you may notice
- Check engine light on without a code in the engine module
- Air conditioning weak or not cooling
- Further A/C codes stored as sporadic
- Likely causes
- LikelySoftware error in the climate or compressor control
- PossibleInternal electronics or inverter of the compressor failing
- RareFault in the high-voltage supply or fuse of the compressor
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.