AutoCodes – GMC – P1BB6 GMC

P1BB6 GMC Code - Hybrid/Electric Vehicle Battery 70 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: P1BB6 GMC indicates Hybrid/Electric Vehicle Battery 70 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 891

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 P1BB6 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 P1BB6 GMC - Hybrid/Electric Vehicle Battery 70 Circuit High Voltage - AutoCodes.com — P1BB6 GMC Code - Hybrid/Electric Vehicle Battery 70 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BB6 GMC?

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

How to Fix the DTC P1BB6 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 P1BB6 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 P1BB6 GMC Code

1. What are common symptoms of OBDII code P1BB6 GMC related to the Hybrid/Electric Vehicle Battery 70 Circuit High Voltage?

- Common symptoms may include reduced hybrid system performance, illuminated warning lights on the dashboard, and potentially the vehicle going into a reduced power mode.

2. What are some possible causes of OBDII code P1BB6 GMC indicating an issue with the Hybrid/Electric Vehicle Battery 70 Circuit High Voltage?

- Potential causes may include a faulty high voltage battery pack, issues with the battery management system, damaged wiring or connectors in the high voltage circuit, or a malfunctioning hybrid system control module.

3. How can I diagnose the OBDII code P1BB6 GMC related to the Hybrid/Electric Vehicle Battery 70 Circuit High Voltage?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the specific code, conducting a thorough visual inspection of the high voltage components, and performing advanced diagnostic tests using specialized equipment.

4. Is it safe to continue driving with OBDII code P1BB6 GMC triggered for the Hybrid/Electric Vehicle Battery 70 Circuit High Voltage?

- It is not recommended to continue driving the vehicle with this code present, as it may indicate a potential high voltage safety risk and could lead to further damage to the hybrid system components.

5. What repairs are typically needed to address OBDII code P1BB6 GMC concerning the Hybrid/Electric Vehicle Battery 70 Circuit High Voltage?

- Repairs may involve repairing or replacing damaged wiring and connectors, replacing the high voltage battery pack or related components, recalibrating the hybrid system control module, and ensuring the overall integrity of the high voltage circuit.

6. Can a DIY enthusiast fix OBDII code P1BB6 GMC related to the Hybrid/Electric Vehicle Battery 70 Circuit High Voltage?

- Due to the complex nature of high voltage systems in hybrid and electric vehicles, it is recommended to seek professional help or take the vehicle to a certified technician with expertise in hybrid vehicle repairs.

7. How can I prevent OBDII code P1BB6 GMC from occurring in the future for the Hybrid/Electric Vehicle Battery 70 Circuit High Voltage?

- Regular maintenance of the high voltage battery system, following manufacturer recommendations for hybrid system care, and addressing any warning signs promptly can help prevent this code from appearing in the future.

8. Are there any safety precautions to be aware of when dealing with OBDII code P1BB6 GMC related to the Hybrid/Electric Vehicle Battery 70 Circuit High Voltage?

- It is crucial to follow all safety protocols for working with high voltage systems, including disconnecting the high voltage system properly, wearing appropriate protective gear, and avoiding contact with exposed high voltage components.

9. Can OBDII code P1BB6 GMC related to the Hybrid/Electric Vehicle Battery 70 Circuit High Voltage be cleared/reset without fixing the underlying issue?

- While the code can be cleared using an OBDII scanner, it is not recommended to do so without addressing the root cause of the problem, as it may lead to recurring issues and potential safety hazards.

10. How much does it typically cost to repair OBDII code P1BB6 GMC concerning the Hybrid/Electric Vehicle Battery 70 Circuit High Voltage?

- The cost of repairs can vary depending on the extent of the damage, the specific components needing replacement, and the labor rates of the repair facility. It is advisable to obtain quotes from different service centers for an accurate estimate.