P0B36 — High Voltage Service Disconnect Circuit High

What Does P0B36 Mean?

P0B36 is a diagnostic trouble code indicating: High Voltage Service Disconnect Circuit High. 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 P0B36

⚠️ Check Engine Light (MIL) illuminated
⚠️ High Voltage Service Disconnect reading stuck at maximum value
⚠️ Related system operating erratically or in default mode
⚠️ System warning light illuminated

Common Causes

🔍 Short to voltage in High Voltage Service Disconnect wiring harness
🔍 Corroded or water-damaged High Voltage Service Disconnect connector
🔍 Faulty High Voltage Service Disconnect outputting maximum voltage
🔍 Damaged wiring rubbing against metal components
🔍 ECM/PCM internal fault (rare)

Frequently Asked Questions

What does P0B36 mean?

P0B36 indicates: High Voltage Service Disconnect Circuit High. 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 P0B36?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P0B36 for extended periods may cause additional problems.

How much does it cost to fix P0B36?

Repair costs for P0B36 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

🔧 Inspect and repair High Voltage Service Disconnect wiring for short to voltage
🔧 Clean or replace corroded High Voltage Service Disconnect connector
🔧 Replace faulty 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.

P0B36: High Voltage Service Disconnect Circuit High