AutoCodes – GMC – P1B70 GMC

P1B70 GMC Code - Hybrid/Electric Vehicle Battery 47 Circuit Low 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: P1B70 GMC indicates Hybrid/Electric Vehicle Battery 47 Circuit Low 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 967

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 P1B70 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 P1B70 GMC - Hybrid/Electric Vehicle Battery 47 Circuit Low Voltage - AutoCodes.com — P1B70 GMC Code - Hybrid/Electric Vehicle Battery 47 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B70 GMC?

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

How to Fix the DTC P1B70 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 P1B70 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 P1B70 GMC Code

1. What are common symptoms of OBDII code P1B70 GMC (Hybrid/Electric Vehicle Battery 47 Circuit Low Voltage)?

Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and potential warning lights on the dashboard.

2. What can cause the OBDII code P1B70 GMC to trigger?

The code P1B70 GMC is typically triggered by issues such as a low voltage condition within the hybrid/electric vehicle battery 47 circuit, faulty battery cells, or problems with the battery management system.

3. How serious is the OBDII code P1B70 GMC?

The OBDII code P1B70 GMC should be addressed promptly to prevent further damage to the hybrid/electric vehicle battery system and to ensure optimal vehicle performance.

4. What should I do if I encounter the OBDII code P1B70 GMC?

It is recommended to have the vehicle diagnosed by a professional technician with experience in hybrid/electric vehicle systems to accurately identify the root cause of the issue.

5. Can I continue driving my vehicle with the OBDII code P1B70 GMC active?

It is not advisable to continue driving the vehicle with the code P1B70 GMC active, as it can lead to potential battery system failures and further damage.

6. How can I repair the OBDII code P1B70 GMC myself?

Repairing the OBDII code P1B70 GMC may require specialized tools and knowledge of hybrid/electric vehicle systems. It is recommended to seek assistance from a qualified technician for proper diagnosis and repair.

7. Are there any preventive maintenance tips to avoid the OBDII code P1B70 GMC?

Regularly servicing the hybrid/electric vehicle battery system, ensuring proper charging habits, and addressing any warning signs promptly can help prevent issues that may trigger the code P1B70 GMC.

8. Can a faulty hybrid/electric vehicle battery 47 circuit cause other problems in the vehicle?

Yes, a faulty hybrid/electric vehicle battery 47 circuit can lead to various issues such as reduced performance, decreased fuel efficiency, and potential damage to other components in the vehicle.

9. How long does it typically take to repair the OBDII code P1B70 GMC?

The repair time for the OBDII code P1B70 GMC can vary depending on the underlying cause of the issue. It is best to consult with a technician for an accurate estimate of the repair time.

10. Is the OBDII code P1B70 GMC covered under any warranty?

Depending on the vehicle's warranty coverage and the specific circumstances, the repair for the OBDII code P1B70 GMC may be covered under warranty. It is recommended to check with the vehicle manufacturer or warranty provider for more information.