⚡ AUTO CODE FIX
🔍
ABS / BrakesCritical✅ DIY Friendly

C0040

Right Front Wheel Speed Sensor Circuit

Fault in right front wheel speed sensor circuit.

SeverityCritical
CategoryABS / Brakes
Est. Repair Cost$150–$400
Code TypeChassis
DIY RepairYes

⚡ Common Causes

⚠️ Symptoms

✅ How to Fix — Step by Step

  • Step 1:Inspect sensor and connector
  • Step 2:Check tone ring
  • Step 3:Test sensor resistance
  • Step 4:Replace sensor or wheel bearing
💡 Pro Tip: ABS sensor connectors are exposed to road salt and moisture — corrosion is a frequent cause.

Repair Cost Estimate

Full Repair Estimate
$150–$400
DIY Possible?
YES
Severity
Critical

Frequently Asked Questions

What does OBD2 code C0040 mean?+
C0040 stands for Right Front Wheel Speed Sensor Circuit. Fault in right front wheel speed sensor circuit.
What causes code C0040?+
Damaged sensor; Broken tone ring; Wiring damage; Corroded connector; Failed wheel bearing
How do I fix code C0040?+
Inspect sensor and connector; Check tone ring; Test sensor resistance; Replace sensor or wheel bearing
How much does it cost to fix C0040?+
Estimated repair cost for C0040 is $150–$400.
Is C0040 DIY-friendly?+
Yes — C0040 is generally DIY-friendly with basic tools.

AI Diagnosis

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