AutoCodes – Cadillac – P1B2C Cadillac

P1B2C Cadillac Code - Hybrid/Electric Vehicle Battery 31 Circuit

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: P1B2C Cadillac indicates Hybrid/Electric Vehicle Battery 31 Circuit.
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 914

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 P1B2C 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 P1B2C Cadillac - Hybrid/Electric Vehicle Battery 31 Circuit - AutoCodes.com — P1B2C Cadillac Code - Hybrid/Electric Vehicle Battery 31 Circuit

What does this mean?

What are the Possible Causes of the DTC P1B2C Cadillac?

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

How to Fix the DTC P1B2C 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 P1B2C 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 P1B2C Cadillac Code

1. What are the common symptoms of OBDII code P1B2C in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms include a decrease in hybrid system performance, reduced fuel efficiency, and potential issues with the vehicle's battery system.

2. What does the OBDII code P1B2C Cadillac Hybrid/Electric Vehicle Battery 31 Circuit indicate?

- This code specifically points to a problem with the circuit related to the hybrid/electric vehicle battery 31 in a Cadillac.

3. What are some possible causes of the P1B2C code in a Cadillac Hybrid/Electric Vehicle?

- Potential causes may include a faulty battery 31 circuit, damaged wiring, loose connections, or problems with the battery itself.

4. How can I diagnose the issue causing the P1B2C code in my Cadillac Hybrid/Electric Vehicle?

- Diagnosing the problem may involve inspecting the battery 31 circuit, checking for loose connections, testing the battery voltage, and using a diagnostic scan tool to gather more information.

5. Is it safe to continue driving my Cadillac with the P1B2C code present?

- It is not recommended to drive the vehicle with this code active, as it can lead to further damage to the hybrid/electric system. It's best to address the issue promptly.

6. Can I reset the P1B2C code in my Cadillac Hybrid/Electric Vehicle myself?

- While you can clear the code using an OBDII scanner, it's crucial to investigate and repair the underlying issue causing the code to prevent it from reoccurring.

7. Are there any DIY repair tips for fixing the P1B2C code in a Cadillac Hybrid/Electric Vehicle?

- DIY repair tips may include checking and securing connections, inspecting wiring for damage, and ensuring the battery 31 circuit is functioning correctly.

8. How much does it typically cost to repair the P1B2C code in a Cadillac Hybrid/Electric Vehicle?

- Repair costs can vary depending on the exact cause of the issue. It's advisable to consult a professional mechanic for an accurate diagnosis and repair estimate.

9. Can the P1B2C code be related to other hybrid/electric system faults in a Cadillac?

- Yes, issues with the hybrid/electric vehicle battery 31 circuit can sometimes be interconnected with other components or circuits in the vehicle's hybrid system.

10. How often should I have the hybrid/electric system in my Cadillac checked to prevent issues like the P1B2C code?

- Regular maintenance and inspections of the hybrid/electric system, including the battery circuits, are recommended to catch potential problems early and prevent codes like P1B2C from occurring.