The ABS/EBCM has detected an abnormal or missing signal from the left rear wheel speed sensor (WSS), which is used to calculate wheel speed for ABS and traction/stability control.
SeverityCritical
CategoryABS / Brakes
Est. Repair Cost$100–$400
Code TypeChassis
DIY RepairYes
⚡ Common Causes
›Failed left rear WSS
›Wiring damage
›Bearing tone ring damaged
⚠️ Symptoms
›ABS light
›Traction control off
✅ How to Fix — Step by Step
Step 1:Check sensor and harness
Step 2:Inspect tone ring
Step 3:Replace sensor
💡 Pro Tip: Inspect the tone ring on the wheel hub for missing teeth or debris before replacing the sensor — a damaged tone ring is a frequent cause of an intermittent WSS signal loss.
Repair Cost Estimate
Full Repair Estimate
$100–$400
DIY Possible?
YES
Severity
Critical
Frequently Asked Questions
What does OBD2 code C0037 mean?+
C0037 stands for Left Rear Wheel Speed Sensor Circuit. The ABS/EBCM has detected an abnormal or missing signal from the left rear wheel speed sensor (WSS), which is used to calculate wheel speed for ABS and traction/stability control.
What causes code C0037?+
Failed left rear WSS; Wiring damage; Bearing tone ring damaged
How do I fix code C0037?+
Check sensor and harness; Inspect tone ring; Replace sensor
How much does it cost to fix C0037?+
Estimated repair cost for C0037 is $100–$400.
Is C0037 DIY-friendly?+
Yes — C0037 is generally DIY-friendly with basic tools.
