AutoCodes – Cadillac – P1B63 Cadillac

P1B63 Cadillac Code - Hybrid/Electric Vehicle Battery 43 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: P1B63 Cadillac indicates Hybrid/Electric Vehicle Battery 43 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 768

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 P1B63 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 P1B63 Cadillac - Hybrid/Electric Vehicle Battery 43 Circuit Performance - AutoCodes.com — P1B63 Cadillac Code - Hybrid/Electric Vehicle Battery 43 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B63 Cadillac?

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

How to Fix the DTC P1B63 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 P1B63 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 P1B63 Cadillac Code

1. What does the OBDII code P1B63 mean on a Cadillac?

P1B63 indicates an issue with the Hybrid/Electric Vehicle Battery 43 Circuit Performance, which means the vehicle's control module has detected a problem in the circuit associated with battery segment 43.

2. What are the common symptoms of code P1B63 in a Cadillac?

Common symptoms include reduced hybrid or EV performance, a check engine light or hybrid system warning, and possible decreased fuel efficiency.

3. What causes the P1B63 code to trigger?

This code can be caused by faulty battery cells, wiring issues related to battery segment 43, a defective battery control module, or poor electrical connections.

4. Can I continue driving my Cadillac with the P1B63 code?

Itâ€™s not recommended to drive for extended periods as this code may indicate compromised battery performance, which could lead to further damage or reduced vehicle functionality.

5. How is the P1B63 code diagnosed?

A technician will use a scan tool to confirm the code, inspect the wiring and connections in battery segment 43, and test the battery cells and control module for faults.

6. What repairs are typically needed to fix the P1B63 code?

Repairs may include replacing damaged wiring, repairing or replacing faulty battery cells, or replacing the battery control module.

7. How much does it cost to fix the P1B63 code on a Cadillac?

The cost varies depending on the root cause, but it can range from $200 for wiring repairs to over $1,000 if battery cells or the control module need replacing.

8. Can a weak 12-volt battery cause the P1B63 code?

While unlikely, a weak 12-volt battery can sometimes cause related system errors. Itâ€™s best to test and rule out the 12-volt battery during diagnosis.

9. Does the P1B63 code always mean the battery needs replacement?

No, the battery itself may not need replacement if the issue is isolated to wiring or the control module. Proper diagnosis is essential.

10. Can I clear the P1B63 code without repairs?

Clearing the code without addressing the issue may temporarily turn off the warning light, but the code will likely return until the underlying problem is fixed.