AutoCodes – Generic – P1B1D

P1B1D 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 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 1,125

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

What does this mean?

What are the Possible Causes of the DTC P1B1D?

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

How to Fix the DTC P1B1D?

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 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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Information for Specific Makes

P1B1D Buick — Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage
P1B1D Cadillac — Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage
P1B1D Chevrolet — Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage
P1B1D GMC — Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage
P1B1D Saturn — Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage

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 Code

1. What are the common symptoms of OBDII code P1B1D (Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage)?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and potential engine stalling.

2. What are the possible causes of OBDII code P1B1D?

- Possible causes include a faulty battery pack, issues with the battery management system, damaged wiring, or a malfunctioning hybrid control module.

3. How can I diagnose the cause of OBDII code P1B1D?

- Diagnosis typically involves using a diagnostic scanner to retrieve the code, inspecting the battery pack and related components for damage, and checking the wiring for any issues or loose connections.

4. Can I continue driving my vehicle with OBDII code P1B1D present?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the hybrid/electric system and potentially unsafe driving conditions.

5. What are some repair tips for fixing OBDII code P1B1D?

- Repair tips may include replacing the battery pack, repairing or replacing damaged wiring, resetting the battery management system, or reprogramming the hybrid control module.

6. How much does it typically cost to repair OBDII code P1B1D?

- The cost of repair can vary depending on the specific issue causing the code, but it may range from a few hundred to a couple thousand dollars, especially if components like the battery pack need to be replaced.

7. Can OBDII code P1B1D be cleared/reset without repairs?

- While the code can be cleared/reset with a diagnostic scanner, it is important to address the underlying issue causing the code to prevent further problems with the vehicle's hybrid/electric system.

8. Are there any preventive measures to avoid OBDII code P1B1D in the future?

- Regular maintenance of the hybrid/electric system, including checking the battery pack and related components, can help prevent issues that may trigger OBDII code P1B1D.

9. Is OBDII code P1B1D specific to certain hybrid/electric vehicle models?

- OBDII code P1B1D related to Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage is typically specific to hybrid or electric vehicles equipped with this particular circuit, and may vary by manufacturer and model.

10. How urgent is it to address OBDII code P1B1D once it appears?

- It is important to address OBDII code P1B1D promptly to prevent further damage to the vehicle's hybrid/electric system and ensure safe and efficient operation of the vehicle.