AutoCodes – Cadillac – P1BCC Cadillac

P1BCC Cadillac Code - Hybrid/Electric Vehicle Battery 78 Circuit Performance

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: P1BCC Cadillac indicates Hybrid/Electric Vehicle Battery 78 Circuit Performance.
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 1,000

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 P1BCC 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 P1BCC Cadillac - Hybrid/Electric Vehicle Battery 78 Circuit Performance - AutoCodes.com — P1BCC Cadillac Code - Hybrid/Electric Vehicle Battery 78 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1BCC Cadillac?

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

How to Fix the DTC P1BCC 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 P1BCC 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 P1BCC Cadillac Code

1. What does the OBDII code P1BCC mean on a Cadillac?

P1BCC indicates an issue with the performance of the Hybrid/Electric Vehicle (HEV) battery 78 circuit, often related to a fault in the battery module or its associated wiring.

2. What are common symptoms of the P1BCC code?

Symptoms may include a check engine light, reduced hybrid or EV performance, decreased fuel efficiency, or the vehicle operating in a limited power mode.

3. What causes the P1BCC code to appear?

This code can be triggered by a faulty hybrid battery module, damaged or corroded wiring/connectors, or an issue with the battery management system.

4. Can I drive my Cadillac with the P1BCC code?

While the vehicle may still be drivable, itâ€™s not recommended to ignore this code, as it can lead to further damage or reduced efficiency in the hybrid/electric system.

5. How is the P1BCC code diagnosed?

A technician will typically use a diagnostic scanner to confirm the code, inspect the hybrid battery and related circuits, and measure voltages and resistances to identify the fault.

6. What repairs are needed to fix the P1BCC code?

Repairs may include replacing the hybrid battery module, repairing or replacing damaged wiring, cleaning corroded connectors, or recalibrating the battery management system.

7. How much does it cost to fix the P1BCC code on a Cadillac?

Repair costs can vary widely, ranging from $200 for wiring repairs to over $1,000 if the hybrid battery module needs replacement.

8. Can a weak 12V battery cause the P1BCC code?

While a weak 12V battery can cause some hybrid system issues, the P1BCC code specifically relates to the hybrid battery circuit and is unlikely to be caused by the 12V battery.

9. Will resetting the code fix the P1BCC issue?

Resetting the code may clear the warning temporarily, but the underlying issue must be repaired to prevent the code from returning.

10. How can I prevent the P1BCC code from appearing?

Regular maintenance of the hybrid system, inspecting connectors for corrosion, and addressing warning signs early can help prevent this code from appearing.