AutoCodes – Generic – P1B52

P1B52 Code - Hybrid/Electric Vehicle Battery 37 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: P1B52 indicates Hybrid/Electric Vehicle Battery 37 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 1,378

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 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B52 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 P1B52 - Hybrid/Electric Vehicle Battery 37 Circuit High Voltage - AutoCodes.com — P1B52 Code - Hybrid/Electric Vehicle Battery 37 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B52?

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

How to Fix the DTC P1B52?

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 P1B52 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 P1B52 code?

Need more information on how to fix the P1B52 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1B52 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1B52 Buick — Hybrid/Electric Vehicle Battery 37 Circuit High Voltage
P1B52 Cadillac — Hybrid/Electric Vehicle Battery 37 Circuit High Voltage
P1B52 Chevrolet — Hybrid/Electric Vehicle Battery 37 Circuit High Voltage
P1B52 GMC — Hybrid/Electric Vehicle Battery 37 Circuit High Voltage
P1B52 Saturn — Hybrid/Electric Vehicle Battery 37 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 P1B52 Code

1. What are the common symptoms of OBDII code P1B52 (Hybrid/Electric Vehicle Battery 37 Circuit High Voltage)?

- Common symptoms include the illumination of the check engine light, decreased fuel efficiency, and potential issues with the hybrid/electric vehicle's battery performance.

2. What are the possible causes of OBDII code P1B52?

- Possible causes of this code include a malfunctioning battery management system, damaged battery cells, faulty high voltage circuit components, or issues with the battery temperature sensor.

3. How can I diagnose the OBDII code P1B52 on my hybrid/electric vehicle?

- Diagnosis typically involves using a professional OBDII scanner to read the code, inspecting the high voltage circuit components, checking the battery health, and testing the battery temperature sensor.

4. Are there any safety precautions to consider when dealing with OBDII code P1B52?

- Yes, it is crucial to handle high voltage components with caution, follow proper safety procedures outlined in the vehicle's repair manual, and consider seeking assistance from a qualified technician.

5. Can I drive my hybrid/electric vehicle with the OBDII code P1B52 present?

- It is not recommended to drive the vehicle with this code active, as it could lead to further damage to the battery system or other critical components. It's best to address the issue promptly.

6. What are some repair tips for fixing OBDII code P1B52?

- Repair tips may include checking and repairing any damaged wiring, replacing faulty battery cells or components, recalibrating the battery management system, and ensuring proper connections in the high voltage circuit.

7. How much does it cost to repair OBDII code P1B52 on a hybrid/electric vehicle?

- The cost of repair can vary depending on the extent of the issue and the specific components that need to be replaced or repaired. It is advisable to consult with a professional technician for an accurate estimate.

8. Can OBDII code P1B52 be triggered by a temporary glitch in the system?

- Yes, sometimes the code can be triggered by a temporary glitch or sensor error. In such cases, resetting the code and monitoring the vehicle's performance may resolve the issue.

9. Is it possible to prevent OBDII code P1B52 from recurring in the future?

- Regular maintenance of the hybrid/electric vehicle's battery system, monitoring the battery health, and addressing any related issues promptly can help prevent the recurrence of this code.

10. How urgent is it to address OBDII code P1B52 on a hybrid/electric vehicle?

- It is recommended to address this code as soon as possible to prevent potential damage to the battery system, ensure the vehicle's optimal performance, and maintain safety while driving.