AutoCodes – Saturn – P0B72 Saturn

P0B72 Saturn Code - Hybrid/Electric Vehicle Battery 12 Circuit

Quick Answer

The Hybrid/Electric Vehicle battery pack contains 288 cells. Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module. 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: P0B72 Saturn indicates Hybrid/Electric Vehicle Battery 12 Circuit.
Common causes: Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module.
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 873

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B72 Saturn Description

The Hybrid/Electric Vehicle battery pack contains 288 cells. Groups of three cells are welded together in parallel. There are a total of 96 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 355 V direct current. The battery cells are also grouped together into three sections. The first 90 cells/30 cell groups make up battery section one. This section is adjacent to the cowl and contains batteries 67 through to 96. Battery section two is located behind section one. It is made up of 72 cells/24 cell groups and contains batteries 43 through to 66. The transverse battery section is section number three, it is made up of the remaining 126 cells/42 cell groups and contains batteries 1 through to 42. The three battery sections are individually serviceable components.
The battery energy control module monitors the voltage of the 96 battery cell groups through the four hybrid/EV battery interface control modules. Voltage sense circuits are attached to each individual cell group, and these sense circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness joins this connector to a hybrid/EV battery interface control module, also located on the top surface of the battery section. The hybrid/EV battery interface control module encodes the voltage reading and transmits it to the battery energy control module through the battery control harness. There is one hybrid/EV battery interface control module located on battery sections one and two, and two hybrid/EV battery interface control modules associated with battery section three. The hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module are all considered serviceable components.
The battery energy control module will determine when a fault condition is present. Diagnostics and system status are communicated from the battery energy control module to hybrid/EV powertrain control module 2 through serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.

OBDII Code P0B72 Saturn - Hybrid/Electric Vehicle Battery 12 Circuit - AutoCodes.com — P0B72 Saturn Code - Hybrid/Electric Vehicle Battery 12 Circuit

What does this mean?

What are the Possible Causes of the DTC P0B72 Saturn?

Faulty Hybrid/Electric Vehicle Battery Pack
Faulty Hybrid/Electric Vehicle Battery Interface Control Module

How to Fix the DTC P0B72 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 P0B72 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.

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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 P0B72 Saturn Code

1. What does OBDII code P0B72 for Saturn Hybrid/Electric Vehicle Battery 12 Circuit indicate?

This code indicates an issue with the 12-volt circuit in the hybrid/electric vehicle battery system of a Saturn vehicle.

2. What are the common symptoms of OBDII code P0B72 in a Saturn hybrid vehicle?

Common symptoms include a check engine light, reduced hybrid system performance, difficulty starting the vehicle, and potential issues with the vehicle's electrical system.

3. What are the possible causes of OBDII code P0B72 in a Saturn hybrid vehicle?

Possible causes include a faulty 12-volt battery, issues with the battery management system, wiring problems, or a malfunctioning hybrid control module.

4. How can I diagnose OBDII code P0B72 in my Saturn hybrid vehicle?

Diagnosis typically involves using a diagnostic scan tool to retrieve the trouble code, inspecting the 12-volt battery and related components, and checking for any visible signs of damage or corrosion.

5. How can I repair OBDII code P0B72 in my Saturn hybrid vehicle?

Repair options may include replacing the 12-volt battery, repairing or replacing damaged wiring, resetting the trouble code with a scan tool, or seeking assistance from a certified technician for further diagnosis and repair.

6. Can driving with OBDII code P0B72 in my Saturn hybrid vehicle cause further damage?

Continuing to drive with this code present can potentially lead to further issues with the vehicle's hybrid system, electrical components, or overall performance. It is recommended to address the issue promptly.

7. Is it safe to continue driving my Saturn hybrid vehicle with OBDII code P0B72 present?

While it may be possible to drive the vehicle for a short distance with this code present, it is advisable to have the issue diagnosed and repaired as soon as possible to prevent any potential safety hazards or further damage.

8. How much does it typically cost to repair OBDII code P0B72 in a Saturn hybrid vehicle?

The cost of repair can vary depending on the specific cause of the code, the extent of the damage, and whether any parts need to be replaced. It is recommended to obtain a diagnostic and repair estimate from a qualified technician.

9. Can I reset OBDII code P0B72 in my Saturn hybrid vehicle on my own?

While you can attempt to reset the trouble code using a diagnostic scan tool, it is important to address the underlying issue causing the code to prevent it from reoccurring. If the code persists, professional diagnosis and repair may be necessary.

10. How can I prevent OBDII code P0B72 from appearing in my Saturn hybrid vehicle in the future?

Regular maintenance of the vehicle's hybrid system, including checking the 12-volt battery, monitoring the electrical components, and addressing any issues promptly, can help prevent the recurrence of this trouble code.