C0107 DTC: Traction Control System Signal Erratic

OBD2 trouble code C0107 indicates that the ABS/Traction Control System (TCS) control module has detected an erratic or unstable signal within the traction control system. The signal is present but fluctuates unexpectedly, preventing the system from accurately controlling wheel slip.

What Does C0107 Mean?

The ABS/TCS module continuously monitors wheel speed sensors and communication circuits. When one or more signals become noisy, distorted, or unstable, the module stores DTC C0107 and may disable traction control to prevent incorrect brake or engine torque intervention.

Typical System Diagram

Wheel Speed Sensors
  │
  ▼
ABS / TCS Module
  ├── ECM / PCM
  ├── CAN Bus
  └── Instrument Cluster

Common Symptoms

• Traction Control warning light ON.
• ABS warning light illuminated.
• Electronic Stability Control disabled.
• Unexpected wheel spin.
• Intermittent traction control operation.
• Additional ABS or CAN communication codes.

Possible Causes

• Noisy wheel speed sensor signal.
• Damaged tone ring.
• Loose or corroded connectors.
• High resistance in wiring.
• Electrical interference.
• Faulty ABS/TCS control module.
• CAN bus communication instability.

Driving Risk Level

Risk Level: Medium

The vehicle usually remains drivable, but traction control performance may be unpredictable. On wet or icy roads, reduced stability assistance can increase the risk of wheel slip.

Diagnostic Flow Chart

Scan ABS Module

↓

Review Freeze Frame Data

↓

Inspect Wheel Speed Sensors

↓

Check Wiring And Connectors

↓

Verify Signal With Oscilloscope

↓

Repair And Road Test

Oscilloscope Diagnostic Test

C0107 is commonly associated with unstable or noisy sensor signals. An oscilloscope is the best tool for identifying irregular pulse patterns that may not be detected with a digital multimeter.

Normal Signal
__|‾|__|‾|__|‾|__|‾|__

Erratic Signal (Typical C0107)
__|‾|_|‾‾|___|_|‾|____|‾

Waveform Analysis: The waveform contains irregular pulse width and inconsistent amplitude, indicating unstable sensor or circuit performance.

Electrical Testing (Typical Values)

Battery Voltage	12.4–12.8 V
Charging Voltage	13.5–14.8 V
Ground Resistance	Less than 0.2 Ω

Scanner Live Data

• Individual Wheel Speeds
• ABS Module Status
• Traction Control Status
• CAN Communication Status
• Battery Voltage
• Brake Switch Status

Estimated Repair Cost

Diagnostic Scan	$50–$120
Wheel Speed Sensor	$100–$350
Tone Ring Replacement	$80–$250
Wiring Repair	$80–$300
ABS Module Replacement	$500–$1,500+

Professional Diagnostic Tips

• Compare wheel speed signals using an oscilloscope.
• Inspect the tone ring for cracks, rust, or missing teeth.
• Perform a wiring wiggle test while monitoring live data.
• Verify proper battery and charging system voltage.
• Road test the vehicle after clearing DTCs.

Common Repairs

• Replace a faulty wheel speed sensor.
• Replace a damaged tone ring.
• Repair wiring or corroded connectors.
• Repair CAN communication faults.
• Replace the ABS/TCS module if necessary.

Related DTC Codes

• C0100 – Traction Control System Malfunction
• C0101 – Traction Control System Performance
• C0104 – Traction Control System Circuit Intermittent
• C0106 – Traction Control System Circuit Range/Performance
• C0110 – ABS Pump Motor Circuit

FAQ

What usually causes C0107?

The most common causes are noisy wheel speed sensor signals, damaged tone rings, loose wiring, electrical interference, or ABS module faults.

Can I drive with C0107?

Yes, but traction control performance may be reduced or disabled. Repairing the fault is recommended to restore maximum vehicle stability.