C05B7 — Brake Booster Temperature Sensor C Circuit Intermittent/Erratic

What Does C05B7 Mean?

C05B7 is a diagnostic trouble code indicating: Brake Booster Temperature Sensor C Circuit Intermittent/Erratic. This code relates to the chassis system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of C05B7

⚠️ Check Engine Light (MIL) illuminated
⚠️ Brake Booster Temperature Sensor C signal cutting in and out
⚠️ Related system working sometimes but not consistently
⚠️ ABS or stability control warning light

Common Causes

🔍 Loose or intermittent connection at Brake Booster Temperature Sensor C
🔍 Wire chafing causing intermittent contact
🔍 Brake Booster Temperature Sensor C failing under heat or vibration
🔍 Corroded connector pins with partial contact

Frequently Asked Questions

What does C05B7 mean?

C05B7 indicates: Brake Booster Temperature Sensor C Circuit Intermittent/Erratic. The vehicle's computer has detected that the Brake Booster Temperature Sensor C is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code C05B7?

Only short distances if absolutely necessary. C05B7 affects a critical system and should be diagnosed within a few days to avoid further damage.

How much does it cost to fix C05B7?

Repair costs for C05B7 typically range from $30 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 reseat all Brake Booster Temperature Sensor C connectors
🔧 Repair chafed or damaged wiring in Brake Booster Temperature Sensor C circuit
🔧 Replace Brake Booster Temperature Sensor C if failing intermittently

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.

C05B7: Brake Booster Temperature Sensor C Circuit Intermittent/Erratic