C05A3 — Wheel Speed Sensors Supply Circuit High

What Does C05A3 Mean?

C05A3 is a diagnostic trouble code indicating: Wheel Speed Sensors Supply Circuit High. This code relates to the chassis system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of C05A3

⚠️ Check Engine Light (MIL) illuminated
⚠️ Wheel Speed Sensors Supply reading stuck at maximum value
⚠️ Related system operating erratically or in default mode
⚠️ ABS or stability control warning light

Common Causes

🔍 Short to voltage in Wheel Speed Sensors Supply wiring harness
🔍 Corroded or water-damaged Wheel Speed Sensors Supply connector
🔍 Faulty Wheel Speed Sensors Supply outputting maximum voltage
🔍 Damaged wiring rubbing against metal components
🔍 ECM/PCM internal fault (rare)

Frequently Asked Questions

What does C05A3 mean?

C05A3 indicates: Wheel Speed Sensors Supply Circuit High. 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 C05A3?

Only short distances if absolutely necessary. C05A3 affects a critical system and should be diagnosed within a few days to avoid further damage.

How much does it cost to fix C05A3?

Repair costs for C05A3 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

🔧 Inspect and repair Wheel Speed Sensors Supply wiring for short to voltage
🔧 Clean or replace corroded Wheel Speed Sensors Supply connector
🔧 Replace faulty 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.

C05A3: Wheel Speed Sensors Supply Circuit High