C056F — Brake Booster Travel Sensor Circuit Low

What Does C056F Mean?

C056F is a diagnostic trouble code indicating: Brake Booster Travel Sensor 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 C056F

⚠️ Check Engine Light (MIL) illuminated
⚠️ Brake Booster Travel Sensor 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 Brake Booster Travel Sensor circuit
🔍 Poor ground connection at Brake Booster Travel Sensor
🔍 Faulty Brake Booster Travel Sensor with no output signal
🔍 Disconnected or loose Brake Booster Travel Sensor connector
🔍 Blown fuse in related circuit

Frequently Asked Questions

What does C056F mean?

C056F indicates: Brake Booster Travel Sensor Circuit Low. The vehicle's computer has detected that the Brake Booster Travel Sensor is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code C056F?

Only short distances if absolutely necessary. C056F affects a critical system and should be diagnosed within a few days to avoid further damage.

How much does it cost to fix C056F?

Repair costs for C056F 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 Brake Booster Travel Sensor circuit
🔧 Clean and secure Brake Booster Travel Sensor connector and ground points
🔧 Replace failed Brake Booster Travel Sensor

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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.

C056F: Brake Booster Travel Sensor Circuit Low