C05F1 — Rear Drive Shaft Speed Sensor Circuit High

What Does C05F1 Mean?

C05F1 is a diagnostic trouble code indicating: Rear Drive Shaft Speed Sensor 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 C05F1

⚠️ Check Engine Light (MIL) illuminated
⚠️ Rear Drive Shaft Speed Sensor 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 Rear Drive Shaft Speed Sensor wiring harness
🔍 Corroded or water-damaged Rear Drive Shaft Speed Sensor connector
🔍 Faulty Rear Drive Shaft Speed Sensor outputting maximum voltage
🔍 Damaged wiring rubbing against metal components
🔍 ECM/PCM internal fault (rare)

Frequently Asked Questions

What does C05F1 mean?

C05F1 indicates: Rear Drive Shaft Speed Sensor Circuit High. The vehicle's computer has detected that the Rear Drive Shaft Speed Sensor is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code C05F1?

Only short distances if absolutely necessary. C05F1 affects a critical system and should be diagnosed within a few days to avoid further damage.

How much does it cost to fix C05F1?

Repair costs for C05F1 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 Rear Drive Shaft Speed Sensor wiring for short to voltage
🔧 Clean or replace corroded Rear Drive Shaft Speed Sensor connector
🔧 Replace faulty Rear Drive Shaft Speed Sensor

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.

C05F1: Rear Drive Shaft Speed Sensor Circuit High