C0201ABS / Traction

Rear ABS Wheel Speed Sensor Circuit

C0201 indicates a general fault in a rear ABS wheel speed sensor circuit. The ABS module is not getting a valid rear wheel speed signal, so it disables ABS and related systems.

🚗 Yes, but ABS, traction, and stability control may be disabled, so fix it soon.

MEDIUM

severity

🎯 Top Causes, Ranked by Likelihood

#1Failed wheel speed sensor$60-$250

40%

A rear wheel speed sensor has failed or corroded.

#2Wiring or connector damage$50-$300

30%

Harness damage near the rear wheel or connector.

#3Damaged tone/reluctor ring$100-$400

20%

Damaged ring produces a poor or missing signal.

#4Excessive air gap or debris$0-$100

10%

Debris or a bent sensor mount corrupts the reading.

🩺 Common Symptoms

ABS warning light on
Traction and stability control lights on
ABS may not activate in a hard stop
Speedometer may act up on some vehicles

💰 Repair Cost: DIY vs Shop

DIY Cost

$60-$300

Shop Cost

$150-$450

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose C0201

1Scan to identify which rear wheel is affected

2Inspect the sensor, connector, and tone ring at that wheel

3Check wiring continuity and the sensor air gap

4Compare live wheel speed data across all wheels

❓ Frequently Asked Questions

Can I drive with C0201?

Yes, normal braking works, but ABS and traction control may be off. Drive carefully in poor weather and fix it soon.

How much to fix C0201?

A wheel speed sensor is typically $150-$450 installed, or less if you DIY.

What causes C0201 most often?

A failed rear wheel speed sensor or damaged wiring near the wheel.

🔗 Related Codes

C0200C0045C0050C0265