P0B37 — High Voltage Service Disconnect Open

What Does P0B37 Mean?

P0B37 is a diagnostic trouble code indicating: High Voltage Service Disconnect Open. This code relates to the vehicle systems system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P0B37

⚠️ Check Engine Light (MIL) illuminated
⚠️ High Voltage Service Disconnect Open not functioning as expected
⚠️ Related system may be in fail-safe mode
⚠️ System warning light illuminated

Common Causes

🔍 Faulty High Voltage Service Disconnect Open
🔍 Wiring or connector issue in High Voltage Service Disconnect Open circuit
🔍 Related mechanical or electrical fault
🔍 ECM/PCM issue (rare)

Frequently Asked Questions

What does P0B37 mean?

P0B37 indicates: High Voltage Service Disconnect Open. The vehicle's computer has detected that the High Voltage Service Disconnect Open is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P0B37?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P0B37 for extended periods may cause additional problems.

How much does it cost to fix P0B37?

Repair costs for P0B37 typically range from $80 to $300, 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 High Voltage Service Disconnect Open and related wiring
🔧 Replace faulty High Voltage Service Disconnect Open

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.

P0B37: High Voltage Service Disconnect Open