AutoCodes – Saturn – P0B78 Saturn

P0B78 Saturn Code - Hybrid/Electric Vehicle Battery 13 Circuit Performance

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: P0B78 Saturn indicates Hybrid/Electric Vehicle Battery 13 Circuit Performance.
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 928

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 P0B78 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 P0B78 Saturn - Hybrid/Electric Vehicle Battery 13 Circuit Performance - AutoCodes.com — P0B78 Saturn Code - Hybrid/Electric Vehicle Battery 13 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P0B78 Saturn?

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

How to Fix the DTC P0B78 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 P0B78 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 P0B78 Saturn Code

1. What are the common symptoms of OBDII code P0B78 in a Saturn hybrid/electric vehicle?

- Common symptoms include reduced hybrid/electric vehicle performance, check engine light illuminated, and potential loss of power.

2. What does the OBDII code P0B78 in a Saturn hybrid/electric vehicle indicate?

- The code P0B78 indicates Hybrid/Electric Vehicle Battery 13 Circuit Performance issue in the vehicle.

3. What are the possible causes of OBDII code P0B78 in a Saturn hybrid/electric vehicle?

- Possible causes include a faulty hybrid/electric vehicle battery, damaged wiring or connectors, poor electrical connections, or a malfunctioning battery management system.

4. How can I diagnose the OBDII code P0B78 in my Saturn hybrid/electric vehicle?

- Diagnosis involves using an OBDII scanner to retrieve the code, inspecting the battery and related components for damage, and checking the wiring and connections for any issues.

5. Can I continue driving my Saturn hybrid/electric vehicle with the OBDII code P0B78?

- It is not recommended to drive the vehicle with the code P0B78 as it can lead to further damage to the hybrid/electric system. It is best to have it diagnosed and repaired promptly.

6. How can I repair the OBDII code P0B78 in my Saturn hybrid/electric vehicle?

- Repair may involve replacing the hybrid/electric vehicle battery, repairing damaged wiring or connectors, ensuring proper electrical connections, or reprogramming the battery management system.

7. Is it safe to attempt repairing the OBDII code P0B78 in my Saturn hybrid/electric vehicle on my own?

- Due to the complexity of the hybrid/electric system, it is recommended to have a qualified technician or mechanic handle the repair to ensure proper diagnosis and safe repair procedures.

8. How much does it typically cost to repair the OBDII code P0B78 in a Saturn hybrid/electric vehicle?

- Repair costs can vary depending on the exact cause of the issue, but it may range from a few hundred to a few thousand dollars, considering parts and labor.

9. Will resetting the OBDII code P0B78 in my Saturn hybrid/electric vehicle make it go away permanently?

- Resetting the code may temporarily clear the check engine light, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause.

10. Can the OBDII code P0B78 in a Saturn hybrid/electric vehicle cause other problems if left untreated?

- Leaving the code untreated can lead to further damage to the hybrid/electric system, reduced performance, and potentially unsafe driving conditions. It is best to address the issue promptly.