Chassis, generic

C0517 Right Rear Wheel Speed Sensor A Correlation

Check engine lightOn

EmissionsNot relevant

Drive cycleRequired

Limp modePossible

C0517 reports that the right rear speed disagrees with the rest of the vehicle. GM's 2025 tables (25OBDG04A) run missing, dropout, fast-missing and too-fast checks for this wheel; the missing-sensor test, a wheel under 1.5 km/h while others exceed 6 km/h, is rated Type B there, i.e. MIL after two trips. The same tables park an internal fault under C0517: when the sensor supply driver's requested and reported states, exchanged with the ASIC over SPI, disagree for 100 ms, the code is set without any wiring fault outside. Mitsubishi lists C1067-64 as C0517 and checks the right rear against the others between 10 and 60 km/h, citing tire size. GM bulletin PIT5950 includes C0517 among repeat codes after a wrong sensor was fitted.

Likely causes

Right rear tire not matching the others in size or wear

Weak encoder or excessive air gap at the right rear

Wrong sensor installed during an earlier repair

Sensor supply driver inside the brake module faulty (GM)

Symptoms

ABS and stability lamps after driving off or at moderate speed
Code returns after sensor replacement if the true cause is elsewhere

Repair estimate

DifficultyMediumDIY possible

Parts and labour€0–600

Time0.3–2.5 h

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

Parts involved

wss rrtone ring rrtiresbrake control module

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