AutoCodes – Cadillac – P1BC1 Cadillac

P1BC1 Cadillac Code - Hybrid/Electric Vehicle Battery 74 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: P1BC1 Cadillac indicates Hybrid/Electric Vehicle Battery 74 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 843

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 P1BC1 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 P1BC1 Cadillac - Hybrid/Electric Vehicle Battery 74 Circuit Low Voltage - AutoCodes.com — P1BC1 Cadillac Code - Hybrid/Electric Vehicle Battery 74 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BC1 Cadillac?

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

How to Fix the DTC P1BC1 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 P1BC1 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 P1BC1 Cadillac Code

1. What are common symptoms of OBDII code P1BC1 in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms include reduced power, decreased fuel efficiency, and difficulty starting the vehicle.

2. What can cause the Hybrid/Electric Vehicle Battery 74 Circuit Low Voltage code in a Cadillac?

- The code can be triggered by a faulty hybrid/electric vehicle battery, issues with battery connections, or problems with the battery management system.

3. How serious is the P1BC1 code in a Cadillac Hybrid/Electric Vehicle?

- The code should be addressed promptly to prevent further damage to the hybrid/electric vehicle system and ensure optimal vehicle performance.

4. Can I still drive my Cadillac with the Hybrid/Electric Vehicle Battery 74 Circuit Low Voltage code?

- It is not recommended to drive the vehicle with this code present, as it may lead to further damage to the hybrid/electric system.

5. What are some DIY repair tips for resolving the P1BC1 code in a Cadillac?

- Check the battery connections for any loose or corroded terminals, inspect the battery for any visible signs of damage, and reset the fault code to see if it reoccurs.

6. Is it safe to reset the OBDII code P1BC1 in a Cadillac Hybrid/Electric Vehicle?

- It is safe to reset the code to see if it reoccurs after addressing any potential issues with the hybrid/electric vehicle battery or system.

7. How can I prevent the Hybrid/Electric Vehicle Battery 74 Circuit Low Voltage code from reappearing in my Cadillac?

- Regularly maintain the hybrid/electric vehicle battery, ensure proper connections, and address any issues with the battery management system promptly.

8. Should I take my Cadillac to a dealership for diagnosis and repair of the P1BC1 code?

- Taking your Cadillac to a dealership or a qualified hybrid/electric vehicle specialist is recommended for accurate diagnosis and proper repair of the code.

9. What are the potential costs associated with fixing the Hybrid/Electric Vehicle Battery 74 Circuit Low Voltage code in a Cadillac?

- The costs can vary depending on the underlying issue, but they may include battery replacement, repairs to the battery management system, and labor costs for diagnosis and repair.

10. Can a faulty hybrid/electric vehicle battery be the sole cause of the P1BC1 code in a Cadillac?

- Yes, a faulty hybrid/electric vehicle battery can be the primary cause of the code, but it is essential to perform a thorough diagnosis to rule out other potential issues.