AutoCodes – GMC – P1BB5 GMC

P1BB5 GMC Code - Hybrid/Electric Vehicle Battery 70 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: P1BB5 GMC indicates Hybrid/Electric Vehicle Battery 70 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 783

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 P1BB5 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 P1BB5 GMC - Hybrid/Electric Vehicle Battery 70 Circuit Low Voltage - AutoCodes.com — P1BB5 GMC Code - Hybrid/Electric Vehicle Battery 70 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BB5 GMC?

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

How to Fix the DTC P1BB5 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 P1BB5 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 P1BB5 GMC Code

1. What are the common symptoms of OBDII code P1BB5 in a GMC hybrid/electric vehicle?

- Common symptoms include reduced driving range, poor acceleration, difficulty starting the vehicle, and warning lights on the dashboard related to the hybrid/electric system.

2. What can cause the OBDII code P1BB5 Hybrid/Electric Vehicle Battery 70 Circuit Low Voltage in a GMC vehicle?

- The code P1BB5 can be triggered by issues such as a faulty hybrid/electric vehicle battery, damaged battery cables, poor battery connections, or problems with the battery management system.

3. How serious is the OBDII code P1BB5 GMC Hybrid/Electric Vehicle Battery 70 Circuit Low Voltage?

- This code indicates a low voltage issue with the hybrid/electric vehicle battery, which can impact the performance and efficiency of the vehicle. It is important to address this issue promptly to avoid further damage to the battery system.

4. What are some DIY repair tips for addressing the OBDII code P1BB5 in a GMC hybrid/electric vehicle?

- DIY repair tips may include checking and tightening battery connections, inspecting battery cables for damage, and ensuring the hybrid/electric vehicle battery is properly charged. However, it is recommended to seek professional help for accurate diagnosis and repair.

5. Can driving with the OBDII code P1BB5 GMC Hybrid/Electric Vehicle Battery 70 Circuit Low Voltage cause further damage?

- Continuing to drive with this code can potentially worsen the condition of the hybrid/electric vehicle battery, leading to decreased performance and potential safety hazards. It is advisable to have the issue diagnosed and repaired as soon as possible.

6. How can a mechanic diagnose the OBDII code P1BB5 in a GMC hybrid/electric vehicle?

- A mechanic can use a diagnostic scanner to read the OBDII code, perform a visual inspection of the battery connections and cables, conduct battery voltage tests, and analyze data from the battery management system to diagnose the issue accurately.

7. Is it safe to reset the OBDII code P1BB5 Hybrid/Electric Vehicle Battery 70 Circuit Low Voltage without fixing the underlying problem?

- Resetting the code without addressing the root cause can temporarily clear the warning light, but the underlying issue with the hybrid/electric vehicle battery will persist. It is essential to fix the problem to ensure the vehicle operates correctly.

8. How much does it typically cost to repair the OBDII code P1BB5 in a GMC hybrid/electric vehicle?

- The cost of repairing the OBDII code P1BB5 can vary depending on the specific issue causing the code, the labor rates of the repair shop, and the cost of any replacement parts needed. It is recommended to obtain quotes from different mechanics for an accurate estimate.

9. Can extreme weather conditions affect the occurrence of the OBDII code P1BB5 GMC Hybrid/Electric Vehicle Battery 70 Circuit Low Voltage?

- Yes, extreme temperatures can impact the performance of the hybrid/electric vehicle battery and potentially trigger the code P1BB5. It is essential to monitor the battery's condition and take precautions in extreme weather conditions.

10. Is it possible to prevent the OBDII code P1BB5 from appearing in a GMC hybrid/electric vehicle?

- Regular maintenance of the hybrid/electric vehicle battery, ensuring proper charging practices, and addressing any battery-related issues promptly can help prevent the occurrence of the code P1BB5. Regular inspections and servicing by qualified technicians are also recommended.