Code
C0367
HUMMER
C — Chassis
ABS wheel speed sensor circuit fault
Views:
UK: 9
EN: 13
RU: 8
AI status
Completed
Completed
100%
Causes
- Damaged or failed wheel speed (ABS) sensor
- Damaged or corroded connector or wiring harness (open/short/poor ground)
- Missing, damaged or dirty tone/ring reluctor on hub or axle
- Wheel bearing or hub damage causing sensor misalignment or intermittent signal
- ABS module or connector fault (less common)
- Contaminants (metal shavings, heavy corrosion) interfering with sensor output
Symptoms
- ABS warning lamp illuminated
- Traction control/ESC warning or reduced function message
- Increased stopping distance or ABS not activating under heavy braking (system disabled for that wheel)
- Intermittent or constant fault code, sometimes only under certain speeds or steering angles
- Unusual noise from hub or wheel bearing if mechanical damage present
What to check
- Connect a scan tool, read stored and pending codes and freeze frame data
- View live wheel speed sensor values while spinning each wheel or driving slowly; compare wheel speeds for consistency
- Visually inspect sensor, connector and wiring for damage, corrosion, looseness or contamination
- Check tone ring/reluctor for missing teeth, cracks, heavy rust or debris and verify correct air gap to sensor
- Backprobe sensor connector and check reference voltage (active/Hall sensors) and ground where applicable
- Measure sensor resistance (for passive/VR type) and check for short to power/ground
Signal parameters
- Passive (variable-reluctance) sensors: DC resistance typically in the hundreds to low thousands of ohms; generate AC voltage proportional to wheel speed (low mV to volts) when wheel spins
- Active (Hall/3-wire) sensors: typically have a reference supply (≈5V) and output a square/pulse signal from ~0–5V; frequency increases with wheel speed
- Expected: consistent, clean square or sinusoidal waveform with amplitude and frequency proportional to wheel speed; no output at rest except reference voltage on active sensors
- Compare measured values to the other wheels and to OEM service specifications when available
Diagnostic algorithm
- Record the code, freeze-frame and vehicle history with a scan tool. Confirm ABS/traction warnings and whether the fault is stored or intermittent.
- Inspect the suspected wheel area (sensor, connector, tone ring, hub) for obvious damage, contamination or missing reluctor teeth. Repair or clean as needed.
- Using scan tool, observe live wheel speed sensor data: spin the wheel by hand (on lift) or perform slow road test to see if the sensor produces a signal and if values match other wheels.
- If no or erratic signal, backprobe the sensor harness: for active sensors check reference voltage (~5V), ground continuity and output waveform with oscilloscope or DVOM; for passive sensors measure DC resistance and AC voltage while spinning.
- Perform a wiggle/stress test on harness and connector while monitoring signal to locate intermittent opens or shorts.
- Inspect tone ring for damage and measure air gap between sensor tip and tone ring; correct alignment or replace faulty components.
- Repair wiring/connectors or replace the faulty sensor or tone ring as required. If wiring is repaired, seal and protect against future corrosion.
- After repairs, clear codes, perform road test to verify correct wheel speed readings and ensure no return of code. If code persists, consider ABS control module or internal connector faults and follow module-specific diagnostics.
Likely causes
- Broken sensor wire at wheel (pinch point near suspension)
- Corroded or pushed-out sensor connector at knuckle
- Excessive air gap between sensor and tone ring due to bent sensor or damaged hub
- Cracked or missing teeth on the tone ring/reluctor
- Intermittent sensor output due to worn wheel bearing allowing sensor movement
- Short to chassis or to 12V in the sensor harness
Fault status
Status
ABS control module detected an abnormal or missing wheel speed sensor signal for one wheel. ABS/traction/stability functionality for that wheel may be limited until the fault is resolved.
Repair difficulty: Medium
Diagnostic time: 0.5-2 hours
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