AutoCodes – Buick – P1B53 Buick

P1B53 Buick 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: P1B53 Buick 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 752

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 P1B53 Buick 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 P1B53 Buick - Hybrid/Electric Vehicle Battery 37 Circuit High Voltage - AutoCodes.com — P1B53 Buick Code - Hybrid/Electric Vehicle Battery 37 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B53 Buick?

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

How to Fix the DTC P1B53 Buick?

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 P1B53 Buick 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 P1B53 Buick Code

1. What are the common symptoms of OBDII code P1B53 in a Buick hybrid/electric vehicle?

- Common symptoms include the Check Engine light illuminating, reduced vehicle performance, and potential issues with the hybrid/electric battery system.

2. What does OBDII code P1B53 Buick Hybrid/Electric Vehicle Battery 37 Circuit High Voltage mean?

- This code indicates a high voltage condition in the circuit related to the hybrid/electric vehicle battery 37.

3. What are the possible causes of OBDII code P1B53 in a Buick hybrid/electric vehicle?

- Possible causes include a faulty hybrid/electric battery 37, damaged wiring or connectors, software issues, or problems with the battery control module.

4. How can I diagnose the OBDII code P1B53 in my Buick hybrid/electric vehicle?

- Diagnosis typically involves using a scan tool to retrieve the code, inspecting the battery system components, checking for loose connections, and performing voltage tests.

5. Can I continue driving my Buick with OBDII code P1B53 present?

- It is not recommended to drive the vehicle with this code present, as it could lead to further damage to the hybrid/electric battery system and potentially affect the vehicle's performance.

6. How can OBDII code P1B53 in a Buick hybrid/electric vehicle be repaired?

- Repair options may include replacing the hybrid/electric battery 37, repairing damaged wiring or connectors, updating software, or addressing issues with the battery control module.

7. Is it safe to attempt repairs related to OBDII code P1B53 on my own?

- Unless you have the necessary knowledge and experience working with hybrid/electric vehicle systems, it is recommended to seek assistance from a qualified technician or dealership for repairs.

8. Can a low voltage condition trigger OBDII code P1B53 in a Buick hybrid/electric vehicle?

- While a low voltage condition is less common, it is still possible for issues like poor battery connections or a failing battery control module to cause this code to appear.

9. How important is it to address OBDII code P1B53 promptly in a Buick hybrid/electric vehicle?

- It is crucial to address this code promptly to prevent further damage to the hybrid/electric battery system and ensure the safe operation of the vehicle.

10. Are there any preventive maintenance tips to avoid encountering OBDII code P1B53 in a Buick hybrid/electric vehicle?

- Regularly inspecting the battery system, ensuring proper connections, and following the manufacturer's recommended maintenance schedule can help prevent issues that may trigger this code.