AutoCodes – Cadillac – P1B48 Cadillac

P1B48 Cadillac Code - Hybrid/Electric Vehicle Battery 34 Circuit Performance

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: P1B48 Cadillac indicates Hybrid/Electric Vehicle Battery 34 Circuit Performance.
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 857

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 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B48 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 P1B48 Cadillac - Hybrid/Electric Vehicle Battery 34 Circuit Performance - AutoCodes.com — P1B48 Cadillac Code - Hybrid/Electric Vehicle Battery 34 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B48 Cadillac?

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

How to Fix the DTC P1B48 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 P1B48 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 P1B48 Cadillac Code

1. What are the common symptoms of OBDII code P1B48 in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms include reduced hybrid battery performance, decreased fuel efficiency, and potential dashboard warning lights.

2. What can cause the OBDII code P1B48 in a Cadillac Hybrid/Electric Vehicle?

- The code P1B48 typically indicates a fault in the Hybrid/Electric Vehicle Battery 34 Circuit, which can be caused by wiring issues, battery cell problems, or a malfunctioning battery management system.

3. How can I diagnose the OBDII code P1B48 in my Cadillac Hybrid/Electric Vehicle?

- Diagnosing the code P1B48 usually involves using a diagnostic scanner to retrieve the specific fault code, inspecting the hybrid battery system for any visible damage, and testing the battery cells and related components.

4. What are the potential repair options for OBDII code P1B48 in a Cadillac Hybrid/Electric Vehicle?

- Repair options may include repairing or replacing damaged wiring, addressing battery cell issues, recalibrating the battery management system, or replacing the hybrid battery pack if necessary.

5. Can I continue driving my Cadillac Hybrid/Electric Vehicle with the OBDII code P1B48 present?

- It is not recommended to continue driving the vehicle with the code P1B48 present, as it can lead to further damage to the hybrid battery system and potentially affect the vehicle's overall performance.

6. How can I prevent the OBDII code P1B48 from occurring in my Cadillac Hybrid/Electric Vehicle?

- Regular maintenance of the hybrid battery system, including checking for any signs of wear or damage, can help prevent the occurrence of the code P1B48. Following the manufacturer's recommended service schedule is also important.

7. Is it safe to attempt repairs related to the OBDII code P1B48 in a Cadillac Hybrid/Electric Vehicle on my own?

- Due to the complexity of hybrid/electric vehicle systems, it is recommended to seek professional assistance from a certified technician or dealership when dealing with issues related to the code P1B48 to ensure proper diagnosis and repair.

8. How much does it typically cost to repair the OBDII code P1B48 in a Cadillac Hybrid/Electric Vehicle?

- The cost of repairing the code P1B48 can vary depending on the extent of the issue, the specific repairs needed, and whether any components require replacement. It is advisable to obtain a diagnosis and estimate from a qualified technician.

9. Can resetting the OBDII code P1B48 in a Cadillac Hybrid/Electric Vehicle resolve the issue temporarily?

- While resetting the code may clear the warning light temporarily, it will not fix the underlying issue causing the code P1B48. It is important to address the root cause of the problem to prevent further issues.

10. Are there any recalls or technical service bulletins related to the OBDII code P1B48 in Cadillac Hybrid/Electric Vehicles?

- It is recommended to check with your local Cadillac dealership or the National Highway Traffic Safety Administration (NHTSA) for any recalls or technical service bulletins related to the code P1B48 in your specific vehicle model.