Engine-CodesGeneric – P0B35

P0B35 Code - High Voltage Service Disconnect Circuit Low

Quick Answer

The diagnostic trouble code P0B35 indicates a problem with the High Voltage Service Disconnect Circuit being low. Common causes include Loose or corroded wiring connections, Faulty high voltage service disconnect circuit components, Damage to the battery pack. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0B35 indicates High Voltage Service Disconnect Circuit Low.
Common causes
Common causes include Loose or corroded wiring connections, Faulty high voltage service disconnect circuit components, Damage to the battery pack.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code P0B35 Description

The diagnostic trouble code P0B35 indicates a problem with the High Voltage Service Disconnect Circuit being low. In hybrid and electric vehicles, the High Voltage Service Disconnect Circuit is a critical component that controls the flow of high voltage electricity from the battery pack to the vehicle's electrical systems. When this circuit is reading low, it means that there is a potential issue with the connection or the circuit itself, which can lead to various performance issues and safety concerns.

OBDII Code P0B35 - High Voltage Service Disconnect Circuit Low
P0B35 Code - High Voltage Service Disconnect Circuit Low

Common Causes of P0B35

  1. Loose or corroded wiring connections
  2. Faulty high voltage service disconnect circuit components
  3. Damage to the battery pack
  4. Electrical system malfunctions
  5. Environmental factors such as extreme temperatures affecting the high voltage system

Symptoms of P0B35

  1. Check engine light illuminated
  2. Hybrid system warning light on the dashboard
  3. Loss of power or reduced acceleration
  4. Vehicle stalling or hesitating while driving
  5. Reduced fuel efficiency

How to Fix P0B35

  1. Begin by conducting a thorough inspection of the high voltage service disconnect circuit and related components.
  2. Check for loose or corroded wiring connections and repair or replace as needed.
  3. Test the high voltage service disconnect circuit components for proper functionality and replace any faulty components.
  4. Inspect the battery pack for any damage or issues that may be affecting the circuit.
  5. Clear the diagnostic trouble code from the vehicle's system and test drive to ensure the issue has been resolved.

Cost to Fix P0B35

The typical repair costs for addressing the P0B35 code can vary depending on the extent of the issue and the specific repairs needed. In general, the cost of parts and labor for this repair can range from $200 to $500. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your vehicle make and model.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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