AutoCodes – GMC – P1B1D GMC

P1B1D GMC Code - Hybrid/Electric Vehicle Battery 29 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: P1B1D GMC indicates Hybrid/Electric Vehicle Battery 29 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 908

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 P1B1D 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 P1B1D GMC - Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage - AutoCodes.com — P1B1D GMC Code - Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B1D GMC?

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

How to Fix the DTC P1B1D 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 P1B1D 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 P1B1D GMC Code

1. What are the common symptoms of OBDII code P1B1D in a GMC hybrid/electric vehicle?

- Common symptoms include poor fuel efficiency, reduced power, difficulty starting the vehicle, and the illumination of the check engine light.

2. What are the possible causes of the Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage code in a GMC vehicle?

- The code P1B1D can be triggered by issues such as a faulty battery pack, damaged wiring, a failing battery management system, or a malfunctioning battery temperature sensor.

3. How can I diagnose the cause of OBDII code P1B1D in my GMC hybrid/electric vehicle?

- To diagnose the issue, it is recommended to perform a thorough inspection of the battery pack, check the wiring for any damage, and use a diagnostic tool to monitor the battery voltage and temperature.

4. Can I continue driving my GMC hybrid/electric vehicle with the P1B1D fault code?

- It is not advisable to continue driving the vehicle with the P1B1D fault code as it can lead to further damage to the battery system and potentially cause safety hazards.

5. How can I reset the OBDII code P1B1D in my GMC hybrid/electric vehicle?

- The fault code can be reset using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes. However, it is important to address the underlying issue causing the code before resetting it.

6. Is it safe to attempt DIY repairs for the Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage code in my GMC vehicle?

- DIY repairs for the P1B1D code can be challenging due to the complexity of the hybrid/electric vehicle system. It is recommended to consult with a professional mechanic or specialized technician for proper diagnosis and repair.

7. How much does it typically cost to repair the P1B1D fault code in a GMC hybrid/electric vehicle?

- The cost of repair for the P1B1D fault code can vary depending on the underlying issue. It is advisable to obtain a diagnosis from a qualified technician to get an accurate estimate for the repair.

8. Can extreme weather conditions affect the occurrence of the OBDII code P1B1D in a GMC hybrid/electric vehicle?

- Yes, extreme temperatures can impact the performance of the hybrid/electric vehicle battery system and potentially trigger the P1B1D fault code. It is important to monitor the battery system in such conditions.

9. Are there any preventive maintenance tips to avoid encountering the Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage code in a GMC vehicle?

- Regularly inspecting the battery system, maintaining proper charging habits, and keeping the vehicle in a cool environment can help prevent issues that lead to the P1B1D fault code.

10. How long does it take to repair the P1B1D fault code in a GMC hybrid/electric vehicle?

- The repair time for the P1B1D fault code can vary based on the specific issue causing the code. It is best to consult with a professional technician to determine the exact repair timeline.