Chassis, generic

C0516 Right Rear Wheel Speed Sensor A Intermittent/Erratic

Check engine lightOn

EmissionsNot relevant

Drive cycleRequired

Limp modePossible

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.

Likely causes

Damaged tone ring teeth or loosely mounted right rear sensor

Rear axle vibration disturbing the signal (GM program 18316)

Harness chafing intermittently (2024 Silverado EV)

Brake module calibration too sensitive, update available

Symptoms

ABS, stability and traction lamps after rough road sections
Functions return only after the next ignition cycle

Repair estimate

DifficultyMediumWorkshop job

Parts and labour€0–500

Time0.3–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

wss rrtone ring rrsensor wiring

References: gsi.ext.gm.com, gsi.ext.gm.com, mitsubishitechinfo.com, static.nhtsa.gov.