C051FMulti-axis Acceleration Sensor Module A Correlation
- Generic OBD-II code · Chassis
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- The brake controller finds that module A's signals do not agree with a second source of the same motion. Audi uses this code on the e-tron: the ABS unit (address 0003) stores C051F00, and Audi's 2019 bulletin names the suspension control module as sensor module A. Waking the bus while the car falls asleep could set it, along with implausible lateral acceleration and yaw codes and a lost airbag-unit message; often an ignition cycle clears it, otherwise a drive above about 30 mph with the wheel turned 60 degrees each way. Bulletin 2061908 (2019 to 2024 e-tron and Q8 e-tron) logs it sporadically and fixes it with new ABS and suspension software. Bosch patents cross-check redundant inertial sensors the same way.
- What you may notice
- ESC warning lamp and several cluster messages
- Yellow drive fault message (Audi e-tron)
- Fault often gone after the next ignition cycle
- Likely causes
- LikelyABS or suspension control software fault (Audi e-tron update)
- PossibleBus woken while modules enter sleep mode (door, charger)
- RareModule A misaligned so its axes no longer match the reference
- RareFault in the comparison source (second inertial sensor, steering angle, wheel speeds)
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.