Chassis, generic

C0508 Right Front Wheel Speed Sensor A Circuit Low

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

C0508 reports the right front sensor circuit below range. A 2024 Jeep Wrangler case from the Stellantis STAR center shows a typical picture: after an earlier repair the ABS lamp came on with C0508-00, ABS disabled and implausible-speed network codes; the sensor harness had been pinched and only needed rerouting. Audi's bulletin 2061331/1 for 2017–2021 A4 and A5 family cars stores C050800 as short to ground when a wire is poorly crimped in the front sensor connector. GM's 2023 tables use C0508 for signal patterns that the current, supply and voltage monitors cannot classify as either a fault or a valid signal (0.12 s, Type A). Mitsubishi's C1063-11 covers short and open circuits on the right front and also lights the parking brake warning.

Likely causes

Sensor harness pinched or misrouted after suspension or brake work
Poorly crimped terminal in the sensor connector (Audi)
Right front sensor shorted internally

Symptoms

  • ABS lamp on, often right after a repair
  • Additional network codes about implausible wheel or vehicle speed
  • Parking brake warning on some models

Repair estimate

DifficultyMediumDIY possible
Parts and labour€0–450
Time0.3–2.5 h

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

Parts involved

wss rfsensor wiring

Related codes

C0506C0507C0509C050AC0502C05A4

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