U0123Lost Communication With Yaw Rate Sensor Module
- Generic OBD-II code · Network
- How the car detects it
- U0123 is stored when the stability controller or another listener misses the messages of a networked yaw rate sensor, the unit that measures how fast the car rotates around its vertical axis. Without that signal ESC cannot compare the actual turn with the steering input. No manufacturer explains U0123 in an openly accessible document; Ford merely lists it among the OBD codes of the 2014 Boss 302S. GM bulletin PIT5187A shows how such sensors are packaged today: yaw rate, inertia and multi-axis sensor are names for one combined module, which is why newer GM cars report it under U0125. Lateral acceleration has its own code U0124, invalid yaw data is U0513. Expect ESC and traction lamps on; driving remains possible.
- What you may notice
- ESC and traction control warning lamps on
- Stability control switched off for the rest of the trip
- Often stored together with U0124 when both signals come from one housing
- Likely causes
- LikelyLoose or corroded connector at the yaw rate sensor (often under the centre console or seat)
- PossibleFuse, supply or ground of the sensor module missing
- PossibleDamaged chassis CAN wiring to the sensor
- RareYaw rate sensor module internally failed
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.