C0465

Code

Generic C — Chassis

Right Rear Wheel Speed Sensor Circuit Fault

Brand: Generic

Type: C — Chassis

Views: UK: 26 EN: 25 RU: 22

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Open or short in right rear wheel speed sensor wiring/harness
Corroded/loose connector at sensor or ABS module
Failed right rear wheel speed sensor
Damaged or contaminated tone ring (missing/damaged teeth, heavy rust/debris)
Intermittent connection from chafing/wiring damage or broken shield
Faulty ABS/traction control module or poor ground at module

Symptoms

ABS and/or traction control warning lamp illuminated
Loss or disablement of ABS/traction control functions
Inconsistent or zero wheel speed reading for right rear on a scan tool/live-data
Unexpected ABS activation or reduced braking performance during an ABS event
Noise from wheel area or rubbing sensation if sensor physically damaged

What to check

Use a scan tool to read DTCs, freeze frame and live wheel speed data (compare RR to other wheels)
Visually inspect RR wheel area: sensor, connector, wiring, tone ring for damage, debris, missing teeth or heavy rust
Backprobing the sensor connector with ignition on to check supply/reference and signal (see signal parameters below)
Measure sensor resistance with connector disconnected (if passive sensor) and compare to specification or opposite wheel
Perform wiggle test while watching live data to detect intermittent wiring faults
Check continuity from sensor connector to ABS module pin and check for short to ground or battery

Signal parameters

Passive (variable-reluctance) sensor: generates AC voltage; amplitude increases with wheel speed (low-speed AC maybe a few hundred mV up to several volts peak at higher speed); DC resistance typically in the hundreds to low thousands of ohms — see vehicle service data
Active (Hall or magnetoresistive) sensor: typically has a reference supply and outputs a square/pulse waveform ~0–5 V (some systems use different logic levels); frequency proportional to wheel speed and duty cycle near 50%
Tone ring/reluctor: one pulse per tooth; expected pulse count equals the ring tooth count — frequency at a given wheel speed depends on tooth count
If no signal at all: open circuit or failed sensor; steady low/high DC may indicate short to ground or battery or lost reference

Diagnostic algorithm

Record freeze-frame data and note when fault occurred. Clear codes and attempt to reproduce fault with live-data monitoring.
Visually inspect RR sensor, connector and harness for damage, corrosion, water intrusion, or pin deformation. Repair or clean as needed.
Safely raise and support vehicle. Rotate the RR wheel by hand; inspect tone ring for missing/broken teeth, heavy rust or debris and check sensor air gap and alignment.
Backprobe the sensor connector with key on (engine off) and check for reference voltage (if active sensor), signal while rotating, and check for short to battery or ground.
If passive sensor, disconnect connector and measure resistance across sensor terminals; compare to spec or to opposite-side sensor. If open/infinite resistance or shorted, replace sensor.
Conduct a continuity check from the sensor connector to the ABS module pin to confirm no breaks. Check for shorts to ground or battery on wiring.
If wiring and connector check good, use an oscilloscope at the sensor connector while rotating wheel to verify waveform shape and amplitude (compare to opposite wheel).
If waveform is intermittent or abnormal and wiring is good, replace the RR sensor. If wiring short/ground is found, repair wiring/connector and secure harness away from moving parts.
After repair, clear codes and perform a test drive with live-data monitoring to confirm proper wheel speed signal and that the DTC does not return.

Likely causes

Corroded/contaminated sensor connector or pin(s)
Broken or pinched harness at suspension articulation/near wheel
Sensor damaged by impact or wheel bearing failure allowing rubbing
Debris, rust or broken teeth on tone ring causing weak/erratic signal
Short to battery or ground at sensor connector due to damaged insulation

Fault status

⚠️ Status

C0465 — Right Rear Wheel Speed Sensor Circuit Fault: ABS module detected open/short/implausible signal from the right rear wheel speed sensor. ABS/traction control may be disabled.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.5 hours