AutoCodes – Generic – P0B52

P0B52 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 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.

Save to My Repairs My Repairs

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

Code Popularity 1,476

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
Add Comment

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

Code P0B52 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 - Hybrid/Electric Vehicle Battery 5 Circuit High Voltage - AutoCodes.com — P0B52 Code - Hybrid/Electric Vehicle Battery 5 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0B52?

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

How to Fix the DTC P0B52?

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 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 P0B52 code?

Need more information on how to fix the P0B52 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0B52 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P0B52 Buick — Hybrid/Electric Vehicle Battery 5 Circuit High Voltage
P0B52 Cadillac — Hybrid/Electric Vehicle Battery 5 Circuit High Voltage
P0B52 Chevrolet — Hybrid/Electric Vehicle Battery 5 Circuit High Voltage
P0B52 GMC — Hybrid/Electric Vehicle Battery 5 Circuit High Voltage
P0B52 Saturn — Hybrid/Electric Vehicle Battery 5 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 P0B52 Code

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

- The common symptoms include the illumination of the check engine light, reduced hybrid system performance, and potential issues with the high voltage battery system.

2. What are the possible causes of OBDII code P0B52?

- The code P0B52 can be triggered by issues such as a faulty high voltage battery cell, damaged battery wiring harness, poor electrical connections, or a malfunctioning battery management system.

3. How can I diagnose the cause of OBDII code P0B52 at home?

- You can start by visually inspecting the high voltage battery and wiring for any visible damage. Using a multimeter, you can also check the voltage levels of individual battery cells to identify any abnormalities.

4. Is it safe to continue driving with OBDII code P0B52 present?

- It is not recommended to continue driving with the code P0B52 active, as it indicates potential high voltage system issues that can pose safety risks and lead to further damage if left unaddressed.

5. What are some repair tips for resolving OBDII code P0B52?

- Repair tips may include checking and repairing any damaged wiring, replacing faulty battery cells, ensuring proper connections, and resetting the battery management system after completing repairs.

6. Can OBDII code P0B52 be cleared/reset without fixing the underlying issue?

- While you can clear the code using an OBDII scanner, it is essential to address the root cause of the problem to prevent the code from reappearing and causing potential safety hazards.

7. How much does it typically cost to repair OBDII code P0B52 in a hybrid/electric vehicle?

- The cost of repair can vary depending on the specific issue causing the code P0B52, but it may involve expenses for parts replacement, labor, and potential diagnostic fees from a qualified technician.

8. Are there any preventive maintenance measures to avoid OBDII code P0B52 in hybrid/electric vehicles?

- Regularly inspecting the high voltage battery system, following manufacturer-recommended maintenance schedules, and addressing any warning signs promptly can help prevent issues leading to code P0B52.