AutoCodes – Saturn – P1B37 Saturn

P1B37 Saturn Code - Battery Energy Control Module Hybrid Battery Voltage Balance Processor 4 Performance

Quick Answer

The hybrid battery pack contains a total of 32 cell groups in the hybrid/EV battery pack assembly. Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy Control Module 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: P1B37 Saturn indicates Battery Energy Control Module Hybrid Battery Voltage Balance Processor 4 Performance.
Common causes: Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy Control Module 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 799

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 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B37 Saturn Description

The hybrid battery pack contains a total of 32 cell groups in the hybrid/EV battery pack assembly. These cell groups are electrically connected in series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 118 V DC. The battery cells are grouped together into two sections, each with 16 cell groups.
The battery energy control module monitors the voltage of the 32 battery cell groups. A voltage sense circuit is attached to each individual cell group. Each of these circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness connectors the voltage sense circuits to the battery energy control module, located directly above the hybrid battery pack.
To ensure proper battery function and lengthen battery life, the battery energy control module balances the voltage of the cells so that each cells maintains the same voltage level. The battery energy control module uses internal voltage gates to transfer voltage from cells with a higher voltage level to those cells with a lower voltage level. To maintain a similar state of charge on the cell groups, the starter/generator control module monitors the cell voltages and determines which cells need energy removed in order to maintain the cells at a similar state of charge. A resistor wired in parallel with the cell and a transistor switch in series with the resistor internal to the battery energy control module. The starter/generator control module sends a command to the battery energy control module to begin cell balancing.

OBDII Code P1B37 Saturn - Battery Energy Control Module Hybrid Battery Voltage Balance Processor 4 Performance - AutoCodes.com — P1B37 Saturn Code - Battery Energy Control Module Hybrid Battery Voltage Balance Processor 4 Performance

What does this mean?

What are the Possible Causes of the DTC P1B37 Saturn?

Faulty Battery Energy Control Module
Battery Energy Control Module harness is open or shorted
Battery Energy Control Module circuit poor electrical connection

How to Fix the DTC P1B37 Saturn?

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 P1B37 Saturn 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.

Need more information about the P1B37 Saturn code?

Need more information on how to fix the P1B37 Saturn code? Get Access to Factory Service Manuals

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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 P1B37 Saturn Code

1. What are the common symptoms of OBDII code P1B37 in a Saturn related to the Battery Energy Control Module Hybrid Battery Voltage Balance Processor 4 Performance?

- Common symptoms include reduced hybrid system performance, poor fuel efficiency, and potentially a warning light on the dashboard indicating a hybrid system fault.

2. What are the possible causes of OBDII code P1B37 in a Saturn?

- The code P1B37 can be triggered by issues such as a failing Battery Energy Control Module or Hybrid Battery Voltage Balance Processor 4, a software glitch, or a problem with the hybrid battery itself.

3. How can I diagnose the source of OBDII code P1B37 in my Saturn?

- Proper diagnosis requires utilizing a professional OBDII scanner to read the code, checking the hybrid system components for any visible damage or corrosion, and consulting the vehicle's service manual for specific diagnostic procedures.

4. Is it safe to continue driving my Saturn with OBDII code P1B37 present?

- It is not recommended to drive the vehicle with the code P1B37 active, as it can lead to further damage to the hybrid system components and potentially cause a complete hybrid system failure.

5. Can I reset OBDII code P1B37 in my Saturn without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it is crucial to address the root cause of the problem to prevent the code from reappearing and ensure the proper functioning of the hybrid system.

6. What are some repair tips for fixing OBDII code P1B37 in a Saturn?

- Repair tips may include checking and repairing any damaged wiring, replacing the faulty Battery Energy Control Module or Hybrid Battery Voltage Balance Processor 4, and performing a software update if necessary.

7. How much does it typically cost to repair OBDII code P1B37 in a Saturn?

- The cost of repair can vary depending on the specific issue causing the code, but it may involve expenses for parts replacement, labor costs, and potential diagnostic fees from a professional technician.

8. Can a DIY enthusiast fix OBDII code P1B37 in a Saturn?

- While some basic troubleshooting and repairs can be done by a knowledgeable DIY enthusiast, dealing with hybrid system components like the Battery Energy Control Module may require specialized tools and expertise best handled by a professional technician.

9. How often does OBDII code P1B37 related to the Battery Energy Control Module Hybrid Battery Voltage Balance Processor 4 Performance occur in Saturn vehicles?

- The occurrence of code P1B37 in Saturn vehicles can vary, but it is relatively rare and often indicates a specific issue related to the hybrid system that requires immediate attention.

10. Is there a recall or technical service bulletin related to OBDII code P1B37 in Saturn vehicles?

- It is recommended to check with the manufacturer or authorized Saturn service centers for any recalls or technical service bulletins related to code P1B37 to see if there are known issues or remedies available.