P0B35 — High Voltage Service Disconnect Circuit Low

What Does P0B35 Mean?

P0B35 is a diagnostic trouble code indicating: High Voltage Service Disconnect Circuit Low. 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 P0B35

⚠️ Check Engine Light (MIL) illuminated
⚠️ High Voltage Service Disconnect reading at zero or minimum value
⚠️ Related system not functioning or in fail-safe mode
⚠️ System warning light illuminated

Common Causes

🔍 Open or broken wire in High Voltage Service Disconnect circuit
🔍 Poor ground connection at High Voltage Service Disconnect
🔍 Faulty High Voltage Service Disconnect with no output signal
🔍 Disconnected or loose High Voltage Service Disconnect connector
🔍 Blown fuse in related circuit

Frequently Asked Questions

What does P0B35 mean?

P0B35 indicates: High Voltage Service Disconnect Circuit Low. The vehicle's computer has detected that the High Voltage Service Disconnect is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P0B35?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P0B35 for extended periods may cause additional problems.

How much does it cost to fix P0B35?

Repair costs for P0B35 typically range from $20 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

🔧 Repair broken wire or restore ground in High Voltage Service Disconnect circuit
🔧 Clean and secure High Voltage Service Disconnect connector and ground points
🔧 Replace failed High Voltage Service Disconnect

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.

P0B35: High Voltage Service Disconnect Circuit Low