AutoCodes – Generic – P0B37

P0B37 Code - High Voltage Service Disconnect Open

Quick Answer

The Engine Control Module (ECM) monitors the High Voltage Service Disconnect Port. Common causes include Faulty Voltage Service Disconnect Port, Voltage Service Disconnect Port harness is open or shorted, Voltage Service Disconnect Port circuit poor electrical connection. 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: P0B37 indicates High Voltage Service Disconnect Open.
Common causes: Common causes include Faulty Voltage Service Disconnect Port, Voltage Service Disconnect Port harness is open or shorted, Voltage Service Disconnect Port circuit poor electrical connection.
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.

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Code Popularity 11,525

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B37 Description

The Engine Control Module (ECM) monitors the High Voltage Service Disconnect Port. The ECM sets the OBDII code when the High Voltage Service Disconnect Port is not to factory specifications.

OBDII Code P0B37 - High Voltage Service Disconnect Open - AutoCodes.com — P0B37 Code - High Voltage Service Disconnect Open

What does this mean?

What are the Possible Causes of the DTC P0B37?

Faulty Voltage Service Disconnect Port
Voltage Service Disconnect Port harness is open or shorted
Voltage Service Disconnect Port circuit poor electrical connection

How to Fix the DTC P0B37?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0B37 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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.

Frequently Asked Questions about P0B37 Code

1. What are the common symptoms of OBDII code P0B37 (High Voltage Service Disconnect Open)?

The common symptoms include the inability to start the vehicle, loss of power while driving, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P0B37 (High Voltage Service Disconnect Open)?

Potential causes include a faulty high voltage service disconnect switch, damaged wiring or connectors in the high voltage system, or a malfunctioning battery management system.

3. How can I diagnose OBDII code P0B37 (High Voltage Service Disconnect Open)?

Diagnosis typically involves using a scan tool to retrieve the code, inspecting the high voltage service disconnect switch and related components for damage, and testing the wiring and connectors for continuity.

4. Can I continue driving with OBDII code P0B37 (High Voltage Service Disconnect Open) present?

It is not recommended to continue driving with this code active, as it may lead to further damage to the high voltage system and potentially pose a safety risk.

5. How can I repair OBDII code P0B37 (High Voltage Service Disconnect Open)?

Repairing the issue may involve replacing the high voltage service disconnect switch, repairing or replacing damaged wiring or connectors, or addressing any underlying issues with the battery management system.

6. Is it safe to attempt repairs for OBDII code P0B37 (High Voltage Service Disconnect Open) on my own?

Due to the high voltage nature of the system, it is recommended to have repairs for this code performed by a qualified technician with experience in handling hybrid or electric vehicles.

7. Will resetting the fault codes clear OBDII code P0B37 (High Voltage Service Disconnect Open)?

Simply resetting the fault codes may temporarily clear the code, but it is crucial to address the underlying issue causing the fault code to prevent it from reoccurring.

8. How can I prevent OBDII code P0B37 (High Voltage Service Disconnect Open) from happening again in the future?

Regular maintenance and inspections of the high voltage system, including the service disconnect switch and associated components, can help prevent this code from reoccurring.

9. Is OBDII code P0B37 (High Voltage Service Disconnect Open) specific to certain vehicle makes and models?

This code is commonly found in hybrid or electric vehicles that utilize a high voltage system, so it may be specific to certain makes and models equipped with such technology.

10. Can OBDII code P0B37 (High Voltage Service Disconnect Open) be a safety concern for the driver and passengers?

Yes, this code can indicate a problem with the high voltage system, which can pose safety risks if not addressed promptly. It is important to have the issue diagnosed and repaired as soon as possible.