AutoCodes – Cadillac – P1BC7 Cadillac

P1BC7 Cadillac Code - Hybrid/Electric Vehicle Battery 76 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: P1BC7 Cadillac indicates Hybrid/Electric Vehicle Battery 76 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 925

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 P1BC7 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 P1BC7 Cadillac - Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage - AutoCodes.com — P1BC7 Cadillac Code - Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BC7 Cadillac?

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

How to Fix the DTC P1BC7 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 P1BC7 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 P1BC7 Cadillac Code

1. What does the OBDII code P1BC7 mean on a Cadillac?

The P1BC7 code indicates a "Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage," meaning one of the battery circuits in the hybrid or electric system is reporting low voltage.

2. What are the common symptoms of the P1BC7 code?

Symptoms may include reduced fuel efficiency, limited hybrid or electric drive functionality, a warning light on the dashboard, or the vehicle entering limp mode.

3. What causes the P1BC7 code to appear?

Common causes include a faulty battery cell, a damaged circuit, corroded or loose electrical connections, or an issue with the battery energy control module.

4. Can I continue driving with a P1BC7 code on my Cadillac?

Itâ€™s not recommended to continue driving, as this code may indicate a serious issue with the hybrid battery system that could lead to further damage or reduced performance.

5. How is the P1BC7 code diagnosed?

A technician will use a scan tool to confirm the code, inspect the hybrid battery for damage or wear, check wiring and connectors, and test the voltage levels of the specific battery circuit.

6. How do I fix the P1BC7 code on my Cadillac?

Repairs may include replacing a faulty battery cell, cleaning or repairing corroded connections, or replacing the battery energy control module if itâ€™s malfunctioning.

7. Is the P1BC7 code covered under warranty for my Cadillac?

Hybrid battery and electrical system issues may be covered under the vehicleâ€™s hybrid or electric system warranty, so check with your dealership for details.

8. What tools are needed to troubleshoot the P1BC7 code?

A professional-grade scan tool, multimeter, and specialized diagnostic equipment for hybrid/electric vehicles are typically required for accurate diagnosis.

9. Could a software issue cause the P1BC7 code?

While less common, outdated or corrupted software in the battery control module could potentially trigger this code and may require a software update.

10. How much does it cost to repair the P1BC7 code on a Cadillac?

Repair costs can vary widely depending on the issue, ranging from $200 for minor wiring repairs to over $1,000 for battery cell or module replacement.