Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the part of the car that disconnects the high voltage battery safely. It's like a safety switch for the car's big battery, and it's not working right.
The P0B33 code is triggered when the vehicle's control module detects an issue with the circuit responsible for disconnecting the high voltage battery when necessary.
The High Voltage Service Disconnect Circuit is designed to safely disconnect the high voltage battery in hybrid and electric vehicles during service or in the event of a fault. This code indicates a fault in the circuit, which could be due to wiring issues, a faulty disconnect switch, or a problem with the control module.
• Check Engine Light illuminated
• Vehicle may not start
• Reduced vehicle performance
• Faulty high voltage service disconnect switch
• Damaged or corroded wiring or connectors
• Faulty control module
High Voltage Battery: A large battery used in hybrid and electric vehicles to power the electric motor.
Service Disconnect: A device that safely disconnects the high voltage battery from the vehicle's electrical system.
• Use an OBD-II scanner to confirm the code.
• Inspect the high voltage service disconnect switch for damage.
• Check wiring and connectors for corrosion or damage.
• Replace the high voltage service disconnect switch if faulty.
• Repair or replace damaged wiring or connectors.
• Replace the control module if necessary.
• OBD-II scanner
• Multimeter
• Insulated tools for high voltage systems
$200 - $600
Difficult
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular inspection of high voltage components
• Ensure connectors are secure and free from corrosion
• Follow manufacturer service guidelines
Electrical Circuit Issue
• Do not attempt to repair high voltage components yourself.
• Have the vehicle inspected by a qualified technician.
• Avoid driving the vehicle until the issue is resolved.
Check with the vehicle manufacturer; high voltage components may be covered under warranty.
This code has become more common with the increase in hybrid and electric vehicles, as these systems rely heavily on high voltage circuits.
High – This issue can affect vehicle safety and performance.
Handling high voltage systems can be dangerous. Only qualified technicians should perform repairs.
• Vehicle in 'On' position
• High voltage battery connected
The high voltage service disconnect is typically located near the high voltage battery pack, often in the rear of the vehicle.
Q: Can I drive my car with a P0B33 code?
A: It's not recommended to drive the vehicle until the issue is resolved, as it can be a safety risk.
Q: Is this a common issue?
A: It can occur in hybrid and electric vehicles, especially if the vehicle is aging or has been in a collision.
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