C0579 — Brake Booster Temperature Sensor B Circuit Low

What Does C0579 Mean?

C0579 is a diagnostic trouble code indicating: Brake Booster Temperature Sensor B 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 C0579

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

Frequently Asked Questions

What does C0579 mean?

C0579 indicates: Brake Booster Temperature Sensor B Circuit Low. The vehicle's computer has detected that the Brake Booster Temperature Sensor B is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code C0579?

Only short distances if absolutely necessary. C0579 affects a critical system and should be diagnosed within a few days to avoid further damage.

How much does it cost to fix C0579?

Repair costs for C0579 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 Temperature Sensor B circuit
🔧 Clean and secure Brake Booster Temperature Sensor B connector and ground points
🔧 Replace failed Brake Booster Temperature Sensor B

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.

C0579: Brake Booster Temperature Sensor B Circuit Low