C0113

Code

Generic C — Chassis

ABS wheel speed sensor circuit — rear right input

Brand: Generic

Type: C — Chassis

Views: UK: 22 EN: 37 RU: 20

AI status

Completed

ready

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Page language: EN

Causes

Damaged or disconnected sensor wiring or connector (open, short to ground, short to voltage)
Corroded/loose connector contacts or water ingress
Failed wheel speed sensor (passive or active type)
Damaged or dirty tone ring (missing teeth) or heavy rust/debris on reluctor
Incorrect air gap between sensor and tone ring (sensor mispositioned)
Faulty ABS/traction control module or poor module ground

Symptoms

ABS warning lamp illuminated on dash
Traction control/ESC lamp may also be illuminated or disabled
ABS or traction interventions may be unavailable for that wheel
Possible inconsistent ABS operation or longer stopping distance under ABS events
Noise or roughness from the wheel if hub bearing or tone ring damaged
Intermittent fault or warnings that change with vehicle speed or wheel movement

What to check

Read DTCs and live data with a scan tool; note freeze frame and related ABS codes
Visually inspect sensor, connector, and wiring at rear right wheel for damage or corrosion
Wiggle harness and connector while watching live sensor data for intermittent changes
Measure sensor resistance with multimeter (for passive sensors) and compare to spec
Back-probe sensor connector for reference voltage, signal, and ground (active sensors)
Spin wheel and check AC voltage (passive) or waveform with oscilloscope (preferred)

Signal parameters

Typical passive (magneto) sensor resistance: varies by vehicle (commonly ~800–2000 Ω) — consult OEM spec
Passive sensor output: AC voltage proportional to speed (low speeds 0.1–1.5 Vp-p, increases with speed)
Active (Hall/VR with electronics) sensor: square/sinusoidal digital signal referenced to 5 V (0–5 V) or 0–12 V depending on vehicle
Waveform: clean, regular pulses with amplitude and frequency proportional to wheel speed; missing pulses or distorted waveform indicate problems
Air gap: typically 0.5–2.0 mm depending on sensor — check OEM spec

Diagnostic algorithm

Safety: Park on level surface or use a lift. Chock wheels and secure vehicle. Follow all workshop safety procedures.
Connect a capable scan tool, read and record DTCs and live data for all wheel speed sensors.
Perform a visual inspection of rear right wheel area: sensor, harness routing, mounting, and tone ring condition.
Unplug the rear right sensor connector, inspect pins for corrosion, bent pins, or moisture; clean and reassemble.
Measure DC resistance across sensor terminals (passive type) and compare to spec; replace sensor if out of range.
For active sensors, back-probe connector with ignition on: verify reference voltage and ground presence at connector.
Spin the wheel by hand (or raise wheel) and measure AC voltage or use an oscilloscope on the signal lead to verify clean pulses.
Wiggle the harness and connector while watching live data/waveform to check for intermittent opens/shorts.
Check continuity from sensor connector to ABS module; verify no shorts to chassis or battery, and confirm module ground integrity.
Inspect tone ring for damage or missing teeth; check wheel bearing play and replace component if mechanically damaged.
If wiring and sensor are good, consider replacing the sensor with a known good unit or substitute and retest.
Clear codes, perform a road test to confirm repair, and re-scan for return of the C0113 code.

Likely causes

Corroded/loose connector at the rear right wheel sensor
Open or shorted sensor wiring harness to the module
Failed wheel speed sensor
Damaged or contaminated tone ring on rear right hub/axle

Fault status

⚠️ Status

ABS warning lamp ON — Rear right wheel speed sensor circuit fault detected. ABS/traction control may be reduced or disabled for that wheel until repaired.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours