Chassis, generic

C0658 Right Front Wheel Speed Sensor B Circuit/Open

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

C0658 reports an open in the wiring of right front sensor B, so the module sees no supply current on that channel. Sensor B is the redundant partner found mainly in brake systems built for automated driving; ABS normally keeps running on sensor A, where an open would show as C0506. Audi's patent for such a pair gives each sensor its own data line to the controller, so that one broken line cannot remove both signals, and suggests a passive inductive sensor as the second one because it works without any supply. For the anti-lock function itself, UN Regulation 13-H demands that every electrical fault, external wiring included, lights the yellow warning. Check plug, cable and sensor. No carmaker publishes C0658; GM's old PIP5094 list uses the number for something else.

Likely causes

Broken or torn sensor cable, often near the steering knuckle
Connector not latched, corroded or with spread terminals
Sensor B interrupted internally

Symptoms

  • Warning for brake or driver assistance system
  • Redundant braking or automated driving not available

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–500
Time0.5–2 h

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

Parts involved

rf wss bsensor wiring

Related codes

C0659C065AC065BC065CC0506C0651

References: patents.google.com, mlit.go.jp, static.nhtsa.gov.