C0502 — Left Front Wheel Speed Sensor A Circuit Low

What Does C0502 Mean?

C0502 is a diagnostic trouble code indicating: Left Front Wheel Speed Sensor A Circuit Low. This code relates to the chassis system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of C0502

⚠️ Check Engine Light (MIL) illuminated
⚠️ Left Front Wheel Speed Sensor A reading at zero or minimum value
⚠️ Related system not functioning or in fail-safe mode
⚠️ ABS or stability control warning light

Common Causes

🔍 Open or broken wire in Left Front Wheel Speed Sensor A circuit
🔍 Poor ground connection at Left Front Wheel Speed Sensor A
🔍 Faulty Left Front Wheel Speed Sensor A with no output signal
🔍 Disconnected or loose Left Front Wheel Speed Sensor A connector
🔍 Blown fuse in related circuit

Frequently Asked Questions

What does C0502 mean?

C0502 indicates: Left Front Wheel Speed Sensor A Circuit Low. The vehicle's computer has detected that the Left Front Wheel Speed Sensor A is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code C0502?

Only short distances if absolutely necessary. C0502 affects a critical system and should be diagnosed within a few days to avoid further damage.

How much does it cost to fix C0502?

Repair costs for C0502 typically range from $20 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

🔧 Repair broken wire or restore ground in Left Front Wheel Speed Sensor A circuit
🔧 Clean and secure Left Front Wheel Speed Sensor A connector and ground points
🔧 Replace failed Left Front Wheel Speed Sensor A

1
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2
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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.

C0502: Left Front Wheel Speed Sensor A Circuit Low