AutoCodes – GMC – P1BA7 GMC

P1BA7 GMC Code - Hybrid/Electric Vehicle Battery 65 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: P1BA7 GMC indicates Hybrid/Electric Vehicle Battery 65 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 761

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 P1BA7 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 P1BA7 GMC - Hybrid/Electric Vehicle Battery 65 Circuit High Voltage - AutoCodes.com — P1BA7 GMC Code - Hybrid/Electric Vehicle Battery 65 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BA7 GMC?

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

How to Fix the DTC P1BA7 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 P1BA7 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 P1BA7 GMC Code

1. What are the common symptoms of OBDII code P1BA7 GMC related to Hybrid/Electric Vehicle Battery 65 Circuit High Voltage?

- Common symptoms include the check engine light illuminating, decreased fuel efficiency, and possible drivability issues.

2. What can cause OBDII code P1BA7 GMC to trigger in a hybrid/electric vehicle?

- This code is typically triggered by high voltage in the Hybrid/Electric Vehicle Battery 65 Circuit, often caused by a battery pack issue or a problem with the high voltage circuitry.

3. How serious is OBDII code P1BA7 GMC in a hybrid/electric vehicle?

- This code should be addressed promptly as it can affect the vehicle's performance and potentially pose a safety risk due to the high voltage nature of the issue.

4. Can I continue driving my hybrid/electric vehicle with OBDII code P1BA7 GMC present?

- It is not recommended to continue driving with this code present, as it can lead to further damage to the high voltage system and potentially leave you stranded.

5. How can I diagnose and repair OBDII code P1BA7 GMC in my hybrid/electric vehicle?

- Proper diagnosis typically involves inspecting the battery pack, high voltage circuitry, and related components. Repairs may involve replacing damaged components or addressing wiring/connectivity issues.

6. Are there any safety precautions I should take when dealing with OBDII code P1BA7 GMC in a hybrid/electric vehicle?

- Yes, it is crucial to follow proper safety procedures when working with high voltage systems. Ensure the vehicle is powered off, wear appropriate safety gear, and consult a professional if unsure.

7. Will resetting the OBDII code P1BA7 GMC make the issue go away in my hybrid/electric vehicle?

- Simply clearing the code without addressing the underlying problem will not fix the issue. It is important to diagnose and repair the root cause to prevent the code from reoccurring.

8. Can a DIY enthusiast without specialized training fix OBDII code P1BA7 GMC in a hybrid/electric vehicle?

- Due to the high voltage nature of the issue, it is recommended to seek assistance from a professional or someone with experience working on hybrid/electric vehicles to safely diagnose and repair this code.

9. How much can I expect to pay to repair OBDII code P1BA7 GMC in my hybrid/electric vehicle?

- The cost of repairs can vary depending on the extent of the issue and the specific components needing attention. It is advisable to get a diagnosis from a qualified technician for an accurate estimate.

10. Can preventative maintenance help prevent OBDII code P1BA7 GMC in a hybrid/electric vehicle?

- Regular maintenance, such as monitoring the high voltage system, checking battery health, and addressing any abnormalities promptly, can help prevent issues that may trigger this code.