AutoCodes – Generic – P1BCE

P1BCE Code - Hybrid/Electric Vehicle Battery 78 Circuit High 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: P1BCE indicates Hybrid/Electric Vehicle Battery 78 Circuit High 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 739

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1BCE 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 P1BCE - Hybrid/Electric Vehicle Battery 78 Circuit High Voltage - AutoCodes.com — P1BCE Code - Hybrid/Electric Vehicle Battery 78 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BCE?

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

How to Fix the DTC P1BCE?

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 P1BCE 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.

Need more information about the P1BCE code?

Need more information on how to fix the P1BCE code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1BCE code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1BCE Buick — Hybrid/Electric Vehicle Battery 78 Circuit High Voltage
P1BCE Cadillac — Hybrid/Electric Vehicle Battery 78 Circuit High Voltage
P1BCE Chevrolet — Hybrid/Electric Vehicle Battery 78 Circuit High Voltage
P1BCE GMC — Hybrid/Electric Vehicle Battery 78 Circuit High Voltage
P1BCE Saturn — Hybrid/Electric Vehicle Battery 78 Circuit High Voltage

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 P1BCE Code

1. What does the OBDII code P1BCE mean?

P1BCE indicates a high voltage issue in the hybrid or electric vehicle battery 78 circuit, typically related to a malfunction in voltage monitoring or wiring.

2. What are the symptoms of the P1BCE code?

Symptoms may include the hybrid or EV system warning light, reduced fuel efficiency, limited power mode, or the inability to start the vehicle.

3. What causes the P1BCE code to appear?

Common causes include faulty battery module sensors, damaged wiring or connectors in the high-voltage circuit, or an issue with the battery management system (BMS).

4. Can I drive my vehicle with the P1BCE code?

While it may still be possible to drive, it is not recommended as it could lead to further damage or safety issues related to the high-voltage system.

5. How is the P1BCE code diagnosed?

A technician will use a diagnostic scanner to confirm the code, inspect wiring and connectors, test the battery module sensors, and check the battery management system.

6. What repairs are needed for the P1BCE code?

Repairs may include replacing damaged wiring, repairing or replacing faulty battery sensors, or addressing issues within the battery management system.

7. How much does it cost to fix the P1BCE code?

Repair costs vary depending on the issue but could range from $200 for wiring repairs to over $1,000 for battery module replacement or BMS repairs.

8. Can the P1BCE code be cleared without fixing the problem?

Clearing the code without addressing the cause may temporarily remove the warning, but the code will likely return, and unresolved issues could worsen over time.

9. What tools are needed to fix the P1BCE code?

Common tools include an OBDII scanner, a multimeter for testing electrical circuits, and specialized tools for handling high-voltage components safely.

10. Is the P1BCE code covered under warranty?

It may be covered under the vehicleâ€™s hybrid or EV system warranty, depending on the manufacturer and the age or mileage of the vehicle. Check with your dealership for details.