C0162

Code

Generic C — Chassis

ABS Wheel Speed Sensor Circuit Range/Performance

Brand: Generic

Type: C — Chassis

Views: UK: 1 EN: 2 RU: 2

AI status

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Page language: EN

Causes

Faulty wheel speed sensor (open, shorted, degraded)
Damaged or corroded sensor connector or wiring (open, short to ground, short to power)
Contaminated, damaged or missing tone ring/reluctor (cracked, bent, excessive rust, missing teeth)
Poor ground or power supply to the sensor or ABS module
Intermittent connector contact due to corrosion, moisture or vibration
Faulty ABS control module or module internal input stage

Symptoms

ABS warning lamp illuminated
Traction control / ESC warning lamp may also be on
ABS may be disabled (no ABS function under heavy braking)
Intermittent or erratic speedometer/odometer readings (on some vehicles)
Inconsistent braking feel or pulsation under non-ABS conditions (rare)
Diagnostic trouble codes stored for a specific wheel or circuit

What to check

Read ABS codes with a scan tool and note freeze-frame/live data
Inspect sensor connector and wiring for damage, corrosion, pin push-out, or water intrusion
Visually inspect tone ring/reluctor for cracks, missing teeth, heavy rust, or debris
Compare wheel speed sensor live data for all four wheels at low speed using a scan tool
Backprobe sensor connector and check for reference voltage (if active sensor) and ground
Measure sensor resistance (passive types) and compare with spec or another wheel

Signal parameters

Passive (variable reluctor) sensors: DC resistance typically ~800–2000 Ω (vehicle-specific)
Passive sensor AC output: low-speed ~0.1–1.0 Vrms, rising with wheel speed; frequency proportional to speed
Active (Hall/electronic) sensors: supply 5 V (sometimes 12 V) reference, output square/pulse 0–5 V (or 0–12 V on some systems)
Pulse frequency typically proportional to wheel RPM; duty cycle ~40–60% on active sensors
Expected amplitude and waveform should be similar across all four wheels under the same conditions

Diagnostic algorithm

Connect a scan tool, record DTCs and live data for all wheel speed sensors. Note which wheel is reporting C0162 or inconsistent reading.
Perform a visual inspection of the suspect sensor, wiring and connector. Look for chafing, pin corrosion, broken strands, melted insulation or rodent damage.
Inspect the tone ring/reluctor on the hub/axle. Look for missing or damaged teeth, heavy rust, debris, or misalignment caused by a bent hub or bearing failure.
With ignition on, backprobe the sensor connector. For active sensors verify reference voltage and ground; for passive sensors check continuity to module ground.
Measure sensor resistance (passive type) and compare to specification or a known-good wheel. Replace if open, shorted or out of range.
Spin the wheel (jack up vehicle safely and support with stands) and measure AC voltage output for passive sensors or digital pulse for active sensors. Use an oscilloscope if available to confirm waveform quality and amplitude.
Wiggle harness and connector while watching live data/waveform to find intermittent faults. Check connector pins for proper seating and corrosion.
If wiring or connector fault found, repair using appropriate crimps, heat-shrink and dielectric grease. If tone ring is damaged, replace or repair hub/tone ring.
If sensor signal is absent or out of spec while wiring is good, replace the wheel speed sensor and retest.
If sensor, wiring and tone ring check good but code persists, perform resistance/voltage checks at ABS module pins. If module input is faulty, consult manufacturer's module diagnostics (module replacement or internal repair may be required).
Clear codes and perform a road test to verify proper operation and that the code does not return.

Likely causes

Sensor wiring harness damage at wheel/hub area (most common)
Contaminated or damaged tone ring (common if rust or debris present)
Failed wheel speed sensor
Poor connector contact/corrosion
Less likely: ABS module fault

Fault status

⚠️ Status

ABS controller detected wheel speed sensor circuit range/performance fault for a wheel speed input. Signal amplitude, frequency or waveform is outside expected parameters or inconsistent with other wheel sensors. Diagnostic data and freeze frame may indicate intermittent or permanent fault.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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