U017ELost Communication With Seat Belt Pretensioner Module A
- Generic OBD-II code · Network
- How the car detects it
- U017E reports that seat belt pretensioner module A no longer communicates. Such modules drive electric, reversible belt tensioners: Audi pre sense pulls the front belts tight by small motors when it senses emergency braking or skidding and releases them if no crash follows. On the 2015 A3, the airbag unit J234 runs the left and right tensioner modules J854/J855 over LIN; the pyrotechnic tensioners are separate. Audi bulletin 2081251 (2025-26 A5, A6, Q5, Q6 e-tron) asks for a report when U017E00 and U017F00 come with a proactive occupant protection fault message. Stellantis calls the U017E partner seatbelt sensor 1 in PCM-update bulletins for the 2021 300, Charger and Challenger, there with a lit MIL.
- What you may notice
- Warning message for pre-crash occupant protection
- Belt no longer pre-tightened during emergency braking
- Airbag lamp on; on some FCA models MIL as well
- Likely causes
- LikelyConnector at the belt retractor module in the pillar loose or damaged
- PossibleNew retractor with control module not coded or basic setting not done
- PossibleHarness damaged or wrongly routed (Jeep JL, shifter area)
- RareSoftware issue in the module or a listener such as the PCM (FCA 2021)
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €80 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.