AutoCodes – Cadillac – P1B53 Cadillac

P1B53 Cadillac 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 Cadillac 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 843

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

What does this mean?

What are the Possible Causes of the DTC P1B53 Cadillac?

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

How to Fix the DTC P1B53 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 P1B53 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 P1B53 Cadillac Code

1. What are the common symptoms of OBDII code P1B53 in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms include reduced fuel efficiency, poor acceleration, check engine light illumination, and potential battery-related warnings on the dashboard.

2. What are the possible causes of OBDII code P1B53 in a Cadillac Hybrid/Electric Vehicle?

- The code P1B53 typically indicates a high voltage issue in the hybrid/electric vehicle battery 37 circuit. Possible causes include a faulty battery pack, damaged wiring, or issues with the battery management system.

3. How serious is OBDII code P1B53 in a Cadillac Hybrid/Electric Vehicle?

- This code should be addressed promptly to prevent further damage to the hybrid/electric vehicle battery system. Ignoring the issue can lead to reduced performance and potential safety hazards.

4. Can I still drive my Cadillac Hybrid/Electric Vehicle with OBDII code P1B53 present?

- It is not recommended to continue driving the vehicle with this code present, as it can impact the vehicle's performance and potentially lead to further damage to the battery system.

5. How can I diagnose and repair OBDII code P1B53 in my Cadillac Hybrid/Electric Vehicle?

- Diagnosis typically involves using a professional OBDII scanner to pinpoint the exact cause of the high voltage issue. Repair may involve replacing the battery pack, repairing damaged wiring, or recalibrating the battery management system.

6. Are there any DIY tips for troubleshooting OBDII code P1B53 in a Cadillac Hybrid/Electric Vehicle?

- While some basic checks like inspecting battery connections and fuses can be done, diagnosing and repairing this code often requires specialized knowledge and equipment best handled by a professional technician.

7. How much does it cost to fix OBDII code P1B53 in a Cadillac Hybrid/Electric Vehicle?

- The cost of fixing this code can vary depending on the exact cause of the issue. It is recommended to consult with a qualified mechanic or dealership for an accurate diagnosis and cost estimate.

8. Can resetting the OBDII system clear code P1B53 in a Cadillac Hybrid/Electric Vehicle?

- While resetting the OBDII system may temporarily clear the code, it is important to address the underlying issue causing the high voltage fault to prevent it from reoccurring.

9. Will replacing the hybrid/electric vehicle battery resolve OBDII code P1B53 in a Cadillac?

- Replacing the battery pack may be necessary if it is determined to be the cause of the high voltage fault. However, it is important to diagnose the issue accurately before proceeding with any repairs.

10. Is it safe to continue driving a Cadillac Hybrid/Electric Vehicle with a high voltage fault triggering OBDII code P1B53?

- It is not safe to drive the vehicle with a high voltage fault, as it can pose a risk to both the vehicle and occupants. It is recommended to have the issue diagnosed and repaired by a professional as soon as possible.