C0639 — Brake Pressure Sensor H Circuit/Open

What Does C0639 Mean?

C0639 is a diagnostic trouble code indicating: Brake Pressure Sensor H Circuit/Open. This code relates to the chassis system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of C0639

⚠️ Check Engine Light (MIL) illuminated
⚠️ Erratic Brake Pressure Sensor H readings
⚠️ Related system operating intermittently
⚠️ ABS or stability control warning light

Common Causes

🔍 Wiring issue in Brake Pressure Sensor H circuit (damaged, chafed, or corroded)
🔍 Faulty Brake Pressure Sensor H connector or terminal
🔍 Failed Brake Pressure Sensor H
🔍 ECM/PCM connection issue

Frequently Asked Questions

What does C0639 mean?

C0639 indicates: Brake Pressure Sensor H Circuit/Open. The vehicle's computer has detected that the Brake Pressure Sensor H is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code C0639?

Only short distances if absolutely necessary. C0639 affects a critical system and should be diagnosed within a few days to avoid further damage.

How much does it cost to fix C0639?

Repair costs for C0639 typically range from $100 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 Brake Pressure Sensor H wiring and connectors
🔧 Replace faulty Brake Pressure Sensor H

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.

C0639: Brake Pressure Sensor H Circuit/Open