C0660 — Left Rear Wheel Speed Sensor B Range/Performance

What Does C0660 Mean?

C0660 is a diagnostic trouble code indicating: Left Rear Wheel Speed Sensor B Range/Performance. This code relates to the chassis system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of C0660

⚠️ Check Engine Light (MIL) illuminated
⚠️ Left Rear Wheel Speed Sensor B not operating within expected parameters
⚠️ Reduced efficiency or performance of related system
⚠️ ABS or stability control warning light

Common Causes

🔍 Left Rear Wheel Speed Sensor B degraded or contaminated
🔍 Mechanical wear or binding in Left Rear Wheel Speed Sensor B
🔍 Incorrect Left Rear Wheel Speed Sensor B installed (wrong part number)
🔍 Related system mechanical issue affecting Left Rear Wheel Speed Sensor B readings

Frequently Asked Questions

What does C0660 mean?

C0660 indicates: Left Rear Wheel Speed Sensor B Range/Performance. The vehicle's computer has detected that the Left Rear Wheel Speed Sensor B is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code C0660?

Only short distances if absolutely necessary. C0660 affects a critical system and should be diagnosed within a few days to avoid further damage.

How much does it cost to fix C0660?

Repair costs for C0660 typically range from $50 to $400, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect and clean Left Rear Wheel Speed Sensor B
🔧 Replace degraded Left Rear Wheel Speed Sensor B
🔧 Check for related mechanical issues affecting readings

1
Find your vehicle above
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2
Check for recalls
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

C0660: Left Rear Wheel Speed Sensor B Range/Performance