U0133Lost Communication With Active Roll Control Module
- Generic OBD-II code · Network
- How the car detects it
- U0133 indicates that the active roll control module, which drives hydraulic or electromechanical anti-roll bars to reduce body lean in corners, no longer answers on the bus. No manufacturer publicly ties U0133 to that module: Saab's 2011 9-5 list uses the number for its air suspension control module instead, so older vehicles may interpret it differently. Systems of this kind exist, for instance on the Bentley Bentayga, where the adaptive suspension unit J775 acts as master for the roll stabiliser units J924 (front axle) and J1096 (rear axle) and their software must match (TPI 2055643). Invalid roll-module data is U0434; suspension modules A and B lose contact under U0132 and U0139. Expect a chassis warning and noticeably more body roll.
- What you may notice
- Chassis or suspension warning lamp
- More body roll when cornering
- Sport or dynamic driving modes unavailable
- Likely causes
- LikelyFuse, supply, ground or CAN wiring of the roll control module faulty
- PossibleSoftware of master and stabiliser units not compatible after a replacement (Bentley TPI 2055643)
- RareRoll control module internally faulty
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.