AutoCodes – Cadillac – P1B8E Cadillac

P1B8E Cadillac Code - Hybrid/Electric Vehicle Battery 57 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: P1B8E Cadillac indicates Hybrid/Electric Vehicle Battery 57 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 927

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 P1B8E 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 P1B8E Cadillac - Hybrid/Electric Vehicle Battery 57 Circuit Low Voltage - AutoCodes.com — P1B8E Cadillac Code - Hybrid/Electric Vehicle Battery 57 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B8E Cadillac?

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

How to Fix the DTC P1B8E 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 P1B8E 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 P1B8E Cadillac Code

1. What are the common symptoms of OBDII code P1B8E Cadillac related to Hybrid/Electric Vehicle Battery 57 Circuit Low Voltage?

- Common symptoms include reduced power and acceleration, poor fuel efficiency, and possible difficulty starting the vehicle.

2. What are the potential causes of OBDII code P1B8E Cadillac indicating Hybrid/Electric Vehicle Battery 57 Circuit Low Voltage?

- Potential causes may include a faulty hybrid/electric vehicle battery, issues with the battery management system, or problems with the high-voltage circuitry.

3. How can I diagnose the issue causing OBDII code P1B8E Cadillac for Hybrid/Electric Vehicle Battery 57 Circuit Low Voltage?

- Diagnosis typically involves using a diagnostic scan tool to read the code and perform additional testing on the hybrid/electric vehicle battery system components.

4. Can I continue driving my Cadillac with OBDII code P1B8E related to Hybrid/Electric Vehicle Battery 57 Circuit Low Voltage?

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

5. What are some repair tips for addressing OBDII code P1B8E Cadillac for Hybrid/Electric Vehicle Battery 57 Circuit Low Voltage?

- Repair tips may include checking the battery connections, inspecting for visible damage to the battery or circuitry, and seeking professional assistance for further diagnosis and repair.

6. Is it safe to attempt to reset the OBDII code P1B8E related to Hybrid/Electric Vehicle Battery 57 Circuit Low Voltage on my Cadillac?

- It is not recommended to simply reset the code without addressing the underlying issue, as the problem may persist and potentially worsen over time.

7. How much does it typically cost to repair OBDII code P1B8E Cadillac for Hybrid/Electric Vehicle Battery 57 Circuit Low Voltage?

- Repair costs can vary depending on the extent of the issue, but it is advisable to budget for potential battery or circuitry replacements, which can be expensive.

8. Are there any preventive measures to avoid triggering OBDII code P1B8E related to Hybrid/Electric Vehicle Battery 57 Circuit Low Voltage?

- Regular maintenance of the hybrid/electric vehicle system, including checking battery health and ensuring proper connections, can help prevent issues leading to this code.

9. Can extreme weather conditions affect the likelihood of encountering OBDII code P1B8E Cadillac for Hybrid/Electric Vehicle Battery 57 Circuit Low Voltage?

- Yes, extreme temperatures or weather conditions can impact the performance and health of the hybrid/electric vehicle battery, potentially leading to voltage-related issues.

10. How long does it typically take to repair OBDII code P1B8E on a Cadillac Hybrid/Electric Vehicle for Battery 57 Circuit Low Voltage?

- Repair times can vary depending on the complexity of the issue and availability of parts, but it is advisable to consult with a professional technician for an accurate estimate.