P0B33 — High Voltage Service Disconnect Circuit

What Does P0B33 Mean?

P0B33 is a diagnostic trouble code indicating: High Voltage Service Disconnect Circuit. 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 P0B33

⚠️ Check Engine Light (MIL) illuminated
⚠️ Erratic High Voltage Service Disconnect readings
⚠️ Related system operating intermittently
⚠️ System warning light illuminated

Common Causes

🔍 Wiring issue in High Voltage Service Disconnect circuit (damaged, chafed, or corroded)
🔍 Faulty High Voltage Service Disconnect connector or terminal
🔍 Failed High Voltage Service Disconnect
🔍 ECM/PCM connection issue

Frequently Asked Questions

What does P0B33 mean?

P0B33 indicates: High Voltage Service Disconnect Circuit. 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 P0B33?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P0B33 for extended periods may cause additional problems.

How much does it cost to fix P0B33?

Repair costs for P0B33 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 and repair High Voltage Service Disconnect wiring and connectors
🔧 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.

P0B33: High Voltage Service Disconnect Circuit