AutoCodes – Generic – P1B70

P1B70 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 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 15,063

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

What does this mean?

What are the Possible Causes of the DTC P1B70?

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

How to Fix the DTC P1B70?

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 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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Need Help with the Code?

Get the P1B70 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1B70 Buick — Hybrid/Electric Vehicle Battery 47 Circuit Low Voltage
P1B70 Cadillac — Hybrid/Electric Vehicle Battery 47 Circuit Low Voltage
P1B70 Chevrolet — Hybrid/Electric Vehicle Battery 47 Circuit Low Voltage
P1B70 GMC — Hybrid/Electric Vehicle Battery 47 Circuit Low Voltage
P1B70 Saturn — Hybrid/Electric Vehicle Battery 47 Circuit Low Voltage

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 Code

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

- Common symptoms include decreased electric vehicle range, reduced power output, and warning lights on the dashboard related to the hybrid/electric system.

2. What are possible causes of OBDII code P1B70?

- Possible causes include a faulty battery pack, issues with the battery management system, poor electrical connections, or a weak hybrid battery.

3. How can I diagnose OBDII code P1B70 at home?

- You can diagnose this code by checking the battery voltage using a multimeter, inspecting the battery connections for corrosion or damage, and scanning for any related trouble codes.

4. Can driving with OBDII code P1B70 cause further damage to my vehicle?

- Driving with this code may lead to reduced performance and potential damage to the hybrid/electric system components over time. It is recommended to address the issue promptly.

5. How can I repair OBDII code P1B70 on my hybrid/electric vehicle?

- Repair options may include replacing the faulty battery pack or components, cleaning and securing electrical connections, resetting the system, or seeking assistance from a certified technician.

6. Is it safe to continue driving my vehicle with OBDII code P1B70?

- It is not recommended to drive the vehicle extensively with this code present, as it can impact the overall performance and safety of the hybrid/electric system.

7. How much does it cost to repair OBDII code P1B70?

- The cost of repairing this code can vary depending on the specific issue, parts needed, and labor costs. It is advisable to obtain quotes from reputable repair shops.

8. Can a DIY enthusiast fix OBDII code P1B70 on their hybrid/electric vehicle?

- While some basic troubleshooting and repairs can be done by DIY enthusiasts, addressing complex issues related to the hybrid/electric system may require specialized knowledge and tools.

9. What preventative measures can I take to avoid OBDII code P1B70 in the future?

- Regularly maintaining the hybrid/electric system, monitoring battery health, avoiding deep discharges, and following manufacturer recommendations for battery care can help prevent this code from appearing.

10. Are there any recalls or service bulletins related to OBDII code P1B70?

- It is advisable to check with the vehicle manufacturer or a certified dealership to inquire about any recalls or service bulletins related to this specific OBDII code for your vehicle model.