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Home / DTC / C1333 — Sensor 2 Fault | Front Right Sensor Fault

C1333 — Sensor 2 Fault | Front Right Sensor Fault

Detailed page for trouble code C1333.

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Code

C1333

HYUNDAI C — Chassis

Sensor 2 Fault | Front Right Sensor Fault

Brand: HYUNDAI
Type: C — Chassis
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted sensor wiring (broken wire, chafing, damaged insulation)
  • Corroded/loose connector or poor pin contact
  • Failed wheel speed sensor (active Hall or passive VR type)
  • Damaged or missing teeth on the tone ring/reluctor
  • Contaminated sensor (metal debris, grease, heavy rust)
  • Wheel bearing or hub damage causing sensor misalignment

Symptoms

  • ABS warning lamp and/or ESC/TCS warning lamp illuminated
  • ABS/ESC traction control may be disabled or limited
  • Possible speedometer/odometer or cruise control irregularities (depending on vehicle)
  • Intermittent fault occurrence when turning or going over bumps
  • Brake pulsation or unusual ABS behavior under braking (if active)

What to check

  • Read ABS/ESC fault codes with a capable scan tool; record freeze frame and live wheel speed values
  • Visually inspect front right wheel sensor and connector for damage, corrosion, contamination or loose mounting
  • Raise vehicle safely, remove wheel, spin hub by hand and inspect tone ring for damage or missing teeth
  • Backprobe sensor connector and check for correct reference voltage (if active sensor) and ground
  • Measure sensor resistance with multimeter (consult vehicle spec) and check for open/short to ground/power
  • With wheel spun, measure sensor output with oscilloscope or multimeter (AC for VR sensor; pulsed DC for active sensor)

Signal parameters

  • Varies by model: some Hyundai models use active (Hall/CMOS) sensors that produce a pulsed 0–5 V square wave; low ~0 V, high ~4–5 V at speed — reference voltage typically 5 V from module
  • Other models use passive variable-reluctance (VR) sensors producing an AC sine voltage. Typical output: ~0.2–1.5 V AC at low speed, increasing with wheel RPM (several volts AC at higher speed)
  • Typical VR sensor resistance range (model dependent): roughly 800–2000 Ω — consult the specific service manual for exact values
  • Signal frequency increases proportionally with wheel speed; a healthy active sensor will show clean square pulses on an oscilloscope

Diagnostic algorithm

  1. Connect a scan tool and confirm C1333, check freeze frame and live wheel speed data. Compare front-right wheel speed to other wheels at low rolling speed.
  2. Visually inspect the front right sensor, connector, and wiring for damage, corrosion, contamination, or loose mounting. Repair any obvious damage.
  3. With vehicle raised and safely supported, rotate the hub by hand. Inspect the tone ring for missing/bent teeth, heavy rust, or debris. Clean or replace as required.
  4. Backprobe the sensor connector: verify reference voltage (if active), ground continuity and signal while spinning the hub. Note irregularities or absence of signal.
  5. Measure sensor resistance (engine off, connector disconnected) and compare to service specification. For VR sensors, check AC output while spinning; for active sensors, check pulsed DC with an oscilloscope or high-speed multimeter.
  6. Wiggle test wiring and connector while observing live data for intermittent changes. Repair broken wires, re‑terminate corroded pins, and replace damaged boots.
  7. If tests point to the sensor, replace the front right wheel speed sensor and retest. If fault persists and wiring is good, inspect ABS module inputs and grounds; consider module bench test or replacement per factory procedures.
  8. Clear codes and perform road test to confirm proper operation and that code does not return.

Likely causes

  • Connector corrosion or water ingress at front right wheel harness
  • Damaged sensor or magnet from road debris
  • Wire harness rubbed through at steering knuckle or suspension joint
  • Reluctor (tone ring) damaged or missing teeth at front right hub

Fault status

⚠️ Status
ABS/ESC control module detected invalid or missing signal from Sensor 2 (Front Right wheel speed sensor). Fault stored; ABS/ESC warning may be illuminated. Inspect sensor, wiring, tone ring and module inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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Browse 371 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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