C0516Right Rear Wheel Speed Sensor A Intermittent/Erratic
- Generic OBD-II code · Chassis
- Turns on the check-engine light
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- C0516 stands for a right rear signal that stutters or spikes. GM's 2025 tables use the 491 m/s² wheel acceleration limit at speeds beyond 3.58 m/s but let the fault mature in about 200 ms of near-continuous violation, sampled every 5 ms, and decay the counter when the signal calms; the 2016 hybrid tables instead set it after a 0.03 s overflow of the timer buffer that stores sensor edges. Mitsubishi files C1067-38 as C0516, checked between 10 and 60 km/h, MIL after two trips. GM's program 18316 shows a rear-specific trigger: on 2018 Express and Savana vans with four-wheel discs, axle vibration over rumble strips made the right rear signal erratic, fixed by a brake module calibration. Bulletin 24-NA-125 lists C0516 too.
- What you may notice
- ABS, stability and traction lamps after rough road sections
- Functions return only after the next ignition cycle
- Likely causes
- LikelyDamaged tone ring teeth or loosely mounted right rear sensor
- PossibleRear axle vibration disturbing the signal (GM program 18316)
- PossibleHarness chafing intermittently (2024 Silverado EV)
- RareBrake module calibration too sensitive, update available
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.