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Home / DTC / C0160 — Right Rear Wheel Speed Sensor Circuit Fault

C0160 — Right Rear Wheel Speed Sensor Circuit Fault

Detailed page for trouble code C0160.

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C0160

Generic C — Chassis

Right Rear Wheel Speed Sensor Circuit Fault

Brand: Generic
Type: C — Chassis
Views: UK: 2 EN: 2 RU: 2
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Page language: EN

Causes

  • Open, shorted or corroded wiring or connector to right rear wheel speed sensor
  • Failed wheel speed sensor (passive VR or active hall/GM/5V type)
  • Damaged, missing or contaminated tone ring/reluctor on the hub/axle
  • Excessive air gap between sensor and tone ring due to bearing wear or misalignment
  • Intermittent connector contact from corrosion or physical damage
  • Faulty ABS/ESC control module or poor ground at module (less common)

Symptoms

  • ABS warning lamp illuminated (may be accompanied by traction control lamp)
  • ABS/ESC and traction control systems may be disabled or behave unpredictably
  • Inconsistent or zero speed readout for the right rear wheel in live data
  • ABS activation at low speeds or unwanted braking/harsh ABS events
  • Possible noise from hub area or wheel bearing play

What to check

  • Read ABS/ESC codes and freeze frame data with a scan tool; note live wheel speed values
  • Visually inspect right rear wheel sensor, connector, wiring harness and tone ring
  • Check for corrosion, bent pins, water intrusion, or damaged insulation in connector
  • Wiggle test wiring while watching live data for intermittent changes
  • Measure sensor resistance and compare to specification, and check continuity to ABS module
  • Spin the wheel and measure AC voltage (VR sensor) or digital pulse (active sensor) or use an oscilloscope

Signal parameters

  • Passive (VR) sensor: DC resistance typically ~500–2000 Ω (varies by manufacturer) — open or very high = faulty
  • Passive sensor AC output: low-speed ~0.1–0.5 Vrms rising with speed; high speed several volts AC depending on tooth count
  • Active (Hall/2-wire/3-wire) sensor: 5 V reference (where applicable) and square-wave output ~0–5 V or 0.5–4.5 V when wheel turns
  • Pulse frequency increases with wheel speed; frequency depends on tone ring tooth count (example: ~50–500+ Hz range)
  • Quiescent (stationary): VR output ~0 Vrms; active sensor may show reference voltage on supply terminal

Diagnostic algorithm

  1. Connect a capable scan tool and confirm C0160, note freeze frame and live right rear wheel speed reading relative to other wheels.
  2. Visually inspect the right rear hub area: sensor position, tone ring condition, debris, and connector integrity. Repair obvious damage.
  3. With ignition on (engine off), disconnect sensor connector and inspect terminals for corrosion, bent pins, water or grease. Reconnect securely.
  4. Measure sensor resistance (if passive type) across the sensor terminals and compare to service spec. Replace if open or out of range.
  5. For passive sensors: spin wheel and measure AC voltage with a multimeter (AC) or use an oscilloscope to verify sine wave amplitude increases with speed.
  6. For active sensors: verify reference voltage (typically 5 V) at the connector, check output waveform while spinning wheel; look for square pulses.
  7. Check wiring continuity and for shorts to ground or Vb between the right rear sensor connector and ABS module connector. Repair damaged wiring.
  8. Perform a wiggle/stress test of the harness while monitoring live data to find intermittent faults.
  9. Inspect wheel bearing for excessive play and correct gap between sensor and tone ring; replace bearing or reposition sensor if necessary.
  10. If wiring and sensor check good, verify ABS module grounds and power. If module outputs and inputs are suspect, consider module bench test or replacement per manufacturer guidance.
  11. After repairs, clear codes and perform a test drive while monitoring live wheel speed values to confirm proper operation and no reoccurrence.

Likely causes

  • Corroded or disconnected connector at the right rear hub
  • Sensor resistance out of specification (open or shorted sensor)
  • Broken or heavily corroded tone ring teeth or magnet debris on ring
  • Wire chafed through or shorted to ground/vehicle body from suspension movement
  • Wheel bearing play altering sensor gap or damaging sensor

Fault status

⚠️ Status
The ABS/traction control module detected an abnormal or missing signal from the right rear wheel speed sensor circuit. The code indicates the module flagged the right rear sensor input as open, shorted, intermittent, or implausible. Safety systems relying on wheel speed may be limited until the fault is corrected.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.5 hours

Similar codes

C0035 C0040 C0050 C0161 C1234
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