AutoCodes – Cadillac – P1BF5 Cadillac

P1BF5 Cadillac Code - Hybrid/Electric Vehicle Battery 91 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: P1BF5 Cadillac indicates Hybrid/Electric Vehicle Battery 91 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.

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Code Popularity 801

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 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1BF5 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 P1BF5 Cadillac - Hybrid/Electric Vehicle Battery 91 Circuit High Voltage - AutoCodes.com — P1BF5 Cadillac Code - Hybrid/Electric Vehicle Battery 91 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BF5 Cadillac?

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

How to Fix the DTC P1BF5 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 P1BF5 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 P1BF5 Cadillac Code

1. What are the common symptoms of OBDII code P1BF5 in a Cadillac Hybrid/Electric Vehicle Battery 91 Circuit High Voltage?

- Common symptoms include reduced fuel efficiency, loss of power, illuminated check engine light, and potential issues with the hybrid/electric system.

2. What are the possible causes of OBDII code P1BF5 in a Cadillac Hybrid/Electric Vehicle Battery 91 Circuit High Voltage?

- Possible causes may include a faulty high voltage battery, damaged wiring or connectors in the circuit, issues with the battery management system, or a malfunctioning hybrid/electric vehicle control module.

3. How can I diagnose OBDII code P1BF5 in a Cadillac Hybrid/Electric Vehicle Battery 91 Circuit High Voltage?

- Diagnosis typically involves using a scan tool to retrieve the specific fault code, inspecting the high voltage battery and related components, and testing the circuit for continuity and voltage levels.

4. Is it safe to continue driving with OBDII code P1BF5 in a Cadillac Hybrid/Electric Vehicle Battery 91 Circuit High Voltage?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the hybrid/electric system and potentially pose safety risks.

5. How can I repair OBDII code P1BF5 in a Cadillac Hybrid/Electric Vehicle Battery 91 Circuit High Voltage?

- Repair may involve replacing the high voltage battery, repairing damaged wiring or connectors, resetting the battery management system, or reprogramming the hybrid/electric vehicle control module.

6. Can I reset OBDII code P1BF5 in a Cadillac Hybrid/Electric Vehicle Battery 91 Circuit High Voltage on my own?

- While you can clear the fault code with a scan tool, it is important to address the underlying issue causing the code to prevent it from reoccurring.

7. Will OBDII code P1BF5 in a Cadillac Hybrid/Electric Vehicle Battery 91 Circuit High Voltage affect the vehicle's performance?

- Yes, this code can impact the vehicle's performance by causing power loss, reduced fuel efficiency, and potential issues with the hybrid/electric system operation.

8. How much does it typically cost to repair OBDII code P1BF5 in a Cadillac Hybrid/Electric Vehicle Battery 91 Circuit High Voltage?

- Repair costs can vary depending on the specific issue causing the code, but it may range from a few hundred to a few thousand dollars, especially if components like the high voltage battery need to be replaced.

9. Are there any preventive maintenance tips to avoid OBDII code P1BF5 in a Cadillac Hybrid/Electric Vehicle Battery 91 Circuit High Voltage?

- Regularly inspecting the high voltage battery, keeping the hybrid/electric system well-maintained, and addressing any warning signs promptly can help prevent this code from occurring.

10. Can a regular mechanic handle the repair for OBDII code P1BF5 in a Cadillac Hybrid/Electric Vehicle Battery 91 Circuit High Voltage?

- It is recommended to take the vehicle to a mechanic or dealership with experience in handling hybrid/electric vehicle systems to ensure proper diagnosis and repair of this code.