AutoCodes – Cadillac – P1B1D Cadillac

P1B1D Cadillac 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 Cadillac 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 693

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

What does this mean?

What are the Possible Causes of the DTC P1B1D Cadillac?

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

How to Fix the DTC P1B1D Cadillac?

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 Cadillac 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 Cadillac Code

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

- Common symptoms include poor fuel efficiency, reduced power, difficulty starting the vehicle, and illuminated warning lights on the dashboard.

2. What are the possible causes of OBDII code P1B1D Cadillac Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage?

- Possible causes may include a faulty hybrid/electric vehicle battery, issues with battery cooling systems, damaged wiring or connectors, or a malfunctioning battery management system.

3. How can I diagnose the OBDII code P1B1D Cadillac Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage?

- Diagnosis typically involves using a diagnostic scanner to retrieve the code, inspecting the battery and related components for visible damage, and testing the battery voltage and charging system.

4. Can I continue driving my Cadillac with the OBDII code P1B1D Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage?

- It is not recommended to continue driving the vehicle with this code as it can lead to further damage to the hybrid/electric system and potentially leave you stranded.

5. What are some repair tips for fixing the OBDII code P1B1D Cadillac Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage?

- Repair tips may include checking and repairing any damaged wiring or connectors, testing and potentially replacing the hybrid/electric vehicle battery, and ensuring proper cooling system operation.

6. How much does it typically cost to repair OBDII code P1B1D Cadillac Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage?

- The cost of repair can vary depending on the specific underlying issue, but it may range from a few hundred to a few thousand dollars, especially if the hybrid/electric vehicle battery needs to be replaced.

7. Can I reset the OBDII code P1B1D Cadillac Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage on my own?

- You can attempt to clear the code using a diagnostic scanner, but it is important to address the root cause of the issue to prevent the code from reappearing.

8. Are there any common mistakes to avoid when dealing with the OBDII code P1B1D Cadillac Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage?

- Avoid ignoring the warning signs associated with this code, neglecting proper maintenance of the hybrid/electric system, and attempting DIY repairs if you are not experienced with hybrid/electric vehicle technology.

9. Is it safe to drive the Cadillac in limp mode triggered by the OBDII code P1B1D Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage?

- Limp mode is designed to protect the vehicle from further damage, but it is best to address the underlying issue promptly to prevent any potential safety hazards or additional damage to the vehicle.

10. How often should I have the hybrid/electric system of my Cadillac inspected to prevent the OBDII code P1B1D Cadillac Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage?

- It is recommended to have the hybrid/electric system inspected regularly as part of your routine maintenance schedule to catch any potential issues early and prevent the occurrence of this code.