AutoCodes – Cadillac – P1B5E Cadillac

P1B5E Cadillac Code - Hybrid/Electric Vehicle Battery 41 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: P1B5E Cadillac indicates Hybrid/Electric Vehicle Battery 41 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 900

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 P1B5E 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 P1B5E Cadillac - Hybrid/Electric Vehicle Battery 41 Circuit Low Voltage - AutoCodes.com — P1B5E Cadillac Code - Hybrid/Electric Vehicle Battery 41 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B5E Cadillac?

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

How to Fix the DTC P1B5E 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 P1B5E 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 P1B5E Cadillac Code

1. What are common symptoms of OBDII code P1B5E Cadillac?

- Common symptoms include reduced hybrid/electric vehicle performance, decreased fuel efficiency, and potential difficulty starting the vehicle.

2. What are the possible causes of OBDII code P1B5E Cadillac?

- The code P1B5E Cadillac typically indicates a malfunction in the Hybrid/Electric Vehicle Battery 41 Circuit Low Voltage, which can be caused by a faulty battery cell, damaged wiring, or a problem with the battery management system.

3. How can I diagnose OBDII code P1B5E Cadillac?

- Diagnosing code P1B5E requires specialized diagnostic tools to scan the vehicle's hybrid/electric system and pinpoint the exact cause of the low voltage issue. It is recommended to consult a professional mechanic or dealership for proper diagnosis.

4. Can I continue driving my vehicle with OBDII code P1B5E Cadillac present?

- It is not recommended to continue driving your vehicle with code P1B5E present, as it may lead to further damage to the hybrid/electric system. It is advisable to have the issue addressed as soon as possible.

5. How can I repair OBDII code P1B5E Cadillac?

- Repairing code P1B5E Cadillac typically involves replacing the defective battery cell, repairing damaged wiring, or addressing any issues with the battery management system. It is recommended to seek professional assistance for proper repair.

6. Are there any DIY tips for troubleshooting OBDII code P1B5E Cadillac?

- While basic troubleshooting steps like checking for loose connections or damaged wiring can be performed by DIY enthusiasts, diagnosing and repairing code P1B5E Cadillac usually requires specialized knowledge and tools. It is best to consult a professional mechanic.

7. How much does it cost to fix OBDII code P1B5E Cadillac?

- The cost of fixing code P1B5E Cadillac can vary depending on the exact cause of the issue, parts needed for repair, and labor costs. It is recommended to obtain estimates from different mechanics or dealerships for an accurate cost assessment.

8. Can a low voltage issue in the Hybrid/Electric Vehicle Battery 41 Circuit cause other problems in the vehicle?

- Yes, a low voltage issue in the Hybrid/Electric Vehicle Battery 41 Circuit can lead to various performance issues in the vehicle, including reduced power output, decreased fuel efficiency, and potential damage to other components in the hybrid/electric system.

9. How often does OBDII code P1B5E Cadillac occur in hybrid/electric vehicles?

- OBDII code P1B5E Cadillac, indicating a Hybrid/Electric Vehicle Battery 41 Circuit Low Voltage, can occur in hybrid/electric vehicles due to various factors such as battery aging, environmental conditions, or manufacturing defects. The frequency of occurrence can vary depending on the vehicle's usage and maintenance history.

10. What should I do if OBDII code P1B5E Cadillac keeps recurring after repair?

- If OBDII code P1B5E Cadillac keeps recurring even after repair, it may indicate a persistent underlying issue with the hybrid/electric system. In such cases, it is recommended to have the vehicle thoroughly inspected by a professional to identify and address the root cause of the problem.