AutoCodes – Generic – P1B2C

P1B2C 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 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 2,762

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

What does this mean?

What are the Possible Causes of the DTC P1B2C?

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

How to Fix the DTC P1B2C?

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 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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Need Help with the Code?

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Information for Specific Makes

P1B2C Buick — Hybrid/Electric Vehicle Battery 31 Circuit
P1B2C Cadillac — Hybrid/Electric Vehicle Battery 31 Circuit
P1B2C Chevrolet — Hybrid/Electric Vehicle Battery 31 Circuit
P1B2C GMC — Hybrid/Electric Vehicle Battery 31 Circuit
P1B2C Saturn — Hybrid/Electric Vehicle Battery 31 Circuit

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 Code

1. What are common symptoms of OBDII code P1B2C (Hybrid/Electric Vehicle Battery 31 Circuit)?

- Common symptoms include decreased hybrid/electric vehicle performance, reduced fuel efficiency, and potential issues with the battery system.

2. What can cause OBDII code P1B2C to trigger?

- The code P1B2C may be triggered by a faulty battery cell, damaged battery wiring, or issues with the battery management system.

3. How serious is OBDII code P1B2C (Hybrid/Electric Vehicle Battery 31 Circuit)?

- This code should be addressed promptly as it can lead to decreased vehicle efficiency and potentially impact the overall performance of the hybrid/electric vehicle.

4. What are some DIY repair tips for OBDII code P1B2C?

- DIY repair tips may include checking the battery connections for any loose or damaged wiring, inspecting the battery cells for signs of wear, and resetting the battery management system.

5. Can OBDII code P1B2C be cleared/reset using an OBDII scanner?

- Yes, an OBDII scanner can be used to clear/reset the code P1B2C after addressing the underlying issue with the hybrid/electric vehicle battery 31 circuit.

6. Is it safe to continue driving with OBDII code P1B2C present?

- It is not recommended to continue driving with OBDII code P1B2C present, as it can lead to further damage to the hybrid/electric vehicle battery system.

7. How can a professional mechanic diagnose OBDII code P1B2C?

- A professional mechanic may use specialized diagnostic equipment to perform a thorough inspection of the hybrid/electric vehicle battery system, including testing the battery cells and checking the wiring connections.

8. What are the potential costs associated with repairing OBDII code P1B2C?

- The cost of repairing OBDII code P1B2C can vary depending on the extent of the issue, but it may involve expenses for parts replacement, labor, and diagnostic testing.

9. Are there any common recalls or technical service bulletins related to OBDII code P1B2C?

- It's advisable to check with the vehicle manufacturer or authorized dealerships for any recalls or technical service bulletins related to OBDII code P1B2C to see if the issue is covered under warranty.

10. How can regular maintenance help prevent OBDII code P1B2C from occurring?

- Regular maintenance, including routine inspections of the hybrid/electric vehicle battery system, can help prevent issues that may trigger OBDII code P1B2C, ensuring optimal performance and efficiency.