AutoCodes – Cadillac – P0B52 Cadillac

P0B52 Cadillac Code - Hybrid/Electric Vehicle Battery 5 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: P0B52 Cadillac indicates Hybrid/Electric Vehicle Battery 5 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 979

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B52 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 P0B52 Cadillac - Hybrid/Electric Vehicle Battery 5 Circuit High Voltage - AutoCodes.com — P0B52 Cadillac Code - Hybrid/Electric Vehicle Battery 5 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0B52 Cadillac?

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

How to Fix the DTC P0B52 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 P0B52 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 P0B52 Cadillac Code

1. What are the common symptoms of OBDII code P0B52 Cadillac Hybrid/Electric Vehicle Battery 5 Circuit High Voltage?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and potential illumination of the hybrid system warning light.

2. What causes the OBDII code P0B52 Cadillac Hybrid/Electric Vehicle Battery 5 Circuit High Voltage?

- This code is typically caused by issues with the high voltage battery system, such as a malfunctioning battery cell or high voltage wiring problems.

3. How can I diagnose the OBDII code P0B52 Cadillac Hybrid/Electric Vehicle Battery 5 Circuit High Voltage?

- Diagnosing this code usually requires specialized equipment to test the high voltage battery system, such as a hybrid vehicle diagnostic scanner or multimeter.

4. Can I continue driving my Cadillac with the OBDII code P0B52 Hybrid/Electric Vehicle Battery 5 Circuit High Voltage?

- It is not recommended to continue driving the vehicle with this code, as it can lead to further damage to the high voltage battery system and potentially unsafe driving conditions.

5. How do I repair the OBDII code P0B52 Cadillac Hybrid/Electric Vehicle Battery 5 Circuit High Voltage?

- Repairing this code often involves inspecting and repairing the high voltage battery system components, such as replacing faulty battery cells or repairing damaged wiring.

6. Are there any safety precautions to take when working on the high voltage battery system related to code P0B52?

- Yes, when working on the high voltage battery system, it is crucial to follow proper safety procedures and wear appropriate personal protective equipment to prevent electric shock or injury.

7. Can a DIY enthusiast fix the OBDII code P0B52 Cadillac Hybrid/Electric Vehicle Battery 5 Circuit High Voltage?

- Due to the complexity and high voltage nature of the system involved, it is recommended to have this code diagnosed and repaired by a qualified hybrid vehicle technician.

8. How often does the OBDII code P0B52 Cadillac Hybrid/Electric Vehicle Battery 5 Circuit High Voltage occur in Cadillac hybrid vehicles?

- This code can occur sporadically in Cadillac hybrid vehicles due to various factors affecting the high voltage battery system's health and performance.

9. Will resetting the OBDII code P0B52 Cadillac Hybrid/Electric Vehicle Battery 5 Circuit High Voltage make it go away permanently?

- Simply resetting the code will not fix the underlying issue causing it. It is important to diagnose and repair the root cause to prevent the code from reoccurring.

10. Is it expensive to repair the OBDII code P0B52 Cadillac Hybrid/Electric Vehicle Battery 5 Circuit High Voltage?

- Repair costs for this code can vary depending on the extent of the issue and the specific components that need to be repaired or replaced within the high voltage battery system.