U0469Invalid Data Received From Starter / Generator Control Module
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- U0469 means the engine controller or gateway receives data from the starter/generator control module but cannot trust it. On 48 V mild hybrids this electronics sits in the belt starter generator, which cranks the engine, recuperates and charges both networks. Audi documents the code for A6, A7, A8, Q7, Q8 and related 48 V models from 2018 on: bulletin 2058831 pairs it with P0CA700 in the 48 V battery and first cures it with generator software; later revisions read the stored generator mode and compare requested with delivered torque, which should agree within 5 Nm. Bulletin 2073284 adds that U0469 often follows other CAN faults (U0028/U0029), so a new generator does not help. Ford's 2014 code list carries U0469 without MIL. U0120 is lost contact. Typical signs: electrical system warning, battery symbol, no start-stop.
- What you may notice
- Electrical system fault message and yellow or red battery symbol
- Start-stop and recuperation no longer work
- 12 V battery not charged while driving
- Likely causes
- LikelyOutdated software in the starter/generator control module
- LikelyOther CAN or sensor faults disturbing the hybrid bus, with the generator only reporting the effect
- Possible48 V battery or 12 V supply problem upsetting the generator electronics
- RareInternal hardware fault in the belt starter generator
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.