AutoCodes – Saturn – P0B70 Saturn

P0B70 Saturn 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 Saturn 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 951

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

What does this mean?

What are the Possible Causes of the DTC P0B70 Saturn?

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

How to Fix the DTC P0B70 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 P0B70 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 P0B70 Saturn Code

1. What does the OBDII code P0B70 mean on a Saturn?

The P0B70 code indicates a "Hybrid/Electric Vehicle Battery 11 Circuit High Voltage," meaning the voltage in the specified battery circuit is higher than the expected range.

2. What are the common symptoms of a P0B70 code?

Symptoms may include a check engine light, reduced fuel efficiency, limited vehicle power, battery overheating, or the hybrid system shutting down.

3. What causes the P0B70 code to appear?

Causes can include a faulty battery module, high resistance or corrosion in the wiring or connectors, a malfunctioning battery management system, or a software issue.

4. Can I drive my Saturn with a P0B70 code?

While the vehicle may still be drivable, continuing to drive with this code can cause further damage to the hybrid system or battery components.

5. How is the P0B70 code diagnosed?

A technician will use a scan tool to monitor battery voltage levels, inspect the wiring and connectors for damage or corrosion, and test the battery modules for proper operation.

6. How do you fix the P0B70 code on a Saturn?

Repairs may involve cleaning or replacing corroded connectors, repairing damaged wiring, replacing a faulty battery module, or reprogramming the battery management system.

7. Can a weak hybrid battery trigger the P0B70 code?

Yes, a degraded or failing hybrid battery can contribute to voltage imbalances and trigger this code.

8. Is the P0B70 code covered under warranty?

Hybrid battery components may be covered under a special warranty, so check with your Saturn dealer for specific coverage details.

9. How much does it cost to repair the P0B70 code?

Costs vary widely depending on the issue. Repairs like cleaning connectors may be inexpensive, but replacing a hybrid battery module could cost several hundred to a few thousand dollars.

10. Can the P0B70 code be cleared without repairs?

Clearing the code without addressing the root cause will likely result in the code returning and potential further damage to the hybrid system.