C05A4 — Wheel Speed Sensors Supply Circuit Low

What Does C05A4 Mean?

C05A4 is a diagnostic trouble code indicating: Wheel Speed Sensors Supply 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 C05A4

⚠️ Check Engine Light (MIL) illuminated
⚠️ Wheel Speed Sensors Supply 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 Wheel Speed Sensors Supply circuit
🔍 Poor ground connection at Wheel Speed Sensors Supply
🔍 Faulty Wheel Speed Sensors Supply with no output signal
🔍 Disconnected or loose Wheel Speed Sensors Supply connector
🔍 Blown fuse in related circuit

Frequently Asked Questions

What does C05A4 mean?

C05A4 indicates: Wheel Speed Sensors Supply Circuit Low. The vehicle's computer has detected that the Wheel Speed Sensors Supply is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code C05A4?

Only short distances if absolutely necessary. C05A4 affects a critical system and should be diagnosed within a few days to avoid further damage.

How much does it cost to fix C05A4?

Repair costs for C05A4 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 Wheel Speed Sensors Supply circuit
🔧 Clean and secure Wheel Speed Sensors Supply connector and ground points
🔧 Replace failed Wheel Speed Sensors Supply

1
Find your vehicle above
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

C05A4: Wheel Speed Sensors Supply Circuit Low