AutoCodes – Chevrolet – P1B63 Chevrolet

P1B63 Chevrolet 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 Chevrolet 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 911

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

What does this mean?

What are the Possible Causes of the DTC P1B63 Chevrolet?

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

How to Fix the DTC P1B63 Chevrolet?

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 Chevrolet 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 Chevrolet Code

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

P1B63 indicates an issue with the performance of Hybrid/Electric Vehicle Battery 43 Circuit, typically related to a specific cell or module in the high-voltage battery system.

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

Symptoms may include reduced hybrid or electric performance, decreased fuel efficiency, illuminated warning lights (such as the check engine or hybrid system light), and possible battery overheating.

3. What causes the P1B63 code to appear?

This code can be triggered by faulty battery cells, wiring issues, poor connections in the high-voltage battery circuit, or a malfunctioning battery management system.

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

While you may be able to drive for a short period, it is not recommended as it could lead to further damage to the high-voltage battery or reduced vehicle performance.

5. How is the P1B63 code diagnosed?

A technician will use a scan tool to analyze the code, inspect the high-voltage battery and its connections, and test the performance of the affected battery cell or module.

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

Repairs may involve replacing a faulty battery cell or module, repairing damaged wiring or connectors, or reprogramming the battery control module.

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

Repair costs can vary widely, ranging from $200 for wiring repairs to $4,000 or more if a high-voltage battery replacement is needed.

8. Can a weak 12V battery cause code P1B63?

While unlikely, a weak or failing 12V battery can sometimes affect hybrid or electric systems, so itâ€™s worth testing and replacing if needed.

9. Does the P1B63 code mean my high-voltage battery needs replacement?

Not necessarily. The issue might be isolated to a specific cell or a wiring fault, which can often be repaired without replacing the entire battery.

10. How can I prevent the P1B63 code from recurring?

Regular maintenance, keeping the battery cooling system clean, and addressing warning lights or performance issues promptly can help prevent future problems.