AutoCodes – GMC – P0B70 GMC

P0B70 GMC Code - Hybrid/Electric Vehicle Battery 11 Circuit High Voltage

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: P0B70 GMC indicates Hybrid/Electric Vehicle Battery 11 Circuit High Voltage.
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 1,046

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 P0B70 GMC 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 P0B70 GMC - Hybrid/Electric Vehicle Battery 11 Circuit High Voltage - AutoCodes.com — P0B70 GMC Code - Hybrid/Electric Vehicle Battery 11 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0B70 GMC?

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

How to Fix the DTC P0B70 GMC?

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 P0B70 GMC 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 P0B70 GMC Code

1. What are the common symptoms of OBDII code P0B70 in a GMC Hybrid/Electric Vehicle?

- Common symptoms include the check engine light coming on, reduced hybrid system performance, and potentially a decrease in fuel efficiency.

2. What is the most common cause of OBDII code P0B70 in a GMC Hybrid/Electric Vehicle?

- The most common cause is a high voltage issue within the battery pack, typically related to one of the battery modules or cells.

3. How can I diagnose the high voltage circuit issue triggering OBDII code P0B70 in my GMC Hybrid/Electric Vehicle?

- It is recommended to conduct a thorough inspection of the hybrid battery pack, checking for any damaged cells, loose connections, or faulty wiring.

4. Can I drive my GMC Hybrid/Electric Vehicle with OBDII code P0B70 present?

- It is not recommended to drive the vehicle with this code present, as it can indicate a serious issue with the high voltage circuit that may lead to further damage or safety concerns.

5. What are some repair options for addressing OBDII code P0B70 in a GMC Hybrid/Electric Vehicle?

- Repair options may include replacing damaged battery modules, repairing faulty wiring, or recalibrating the hybrid system to resolve the high voltage circuit issue.

6. Is it safe to attempt repairs related to OBDII code P0B70 in a GMC Hybrid/Electric Vehicle without proper training or experience?

- Due to the high voltage nature of hybrid systems, it is not safe to attempt repairs without proper training and experience. Seek professional assistance from a qualified technician.

7. How much does it typically cost to repair OBDII code P0B70 in a GMC Hybrid/Electric Vehicle?

- Repair costs can vary depending on the extent of the issue and the specific repairs needed, but they can range from a few hundred to a few thousand dollars.

8. Are there any preventive maintenance tips to avoid triggering OBDII code P0B70 in a GMC Hybrid/Electric Vehicle?

- Regularly inspecting the hybrid battery pack, following manufacturer maintenance schedules, and avoiding extreme temperature conditions can help prevent high voltage circuit issues.

9. Can a DIY enthusiast with hybrid vehicle knowledge tackle the repair of OBDII code P0B70 in a GMC Hybrid/Electric Vehicle?

- While some experienced DIY enthusiasts may have the knowledge to address certain aspects of the repair, working on high voltage systems should be left to professionals for safety reasons.

10. How urgent is it to address OBDII code P0B70 in a GMC Hybrid/Electric Vehicle once it appears?

- It is recommended to address this code promptly to prevent further damage to the high voltage circuit and ensure the safe operation of the hybrid/electric vehicle.