AutoCodes – Cadillac – P1BBA Cadillac

P1BBA Cadillac Code - Hybrid/Electric Vehicle Battery 72 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: P1BBA Cadillac indicates Hybrid/Electric Vehicle Battery 72 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 778

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 P1BBA 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 P1BBA Cadillac - Hybrid/Electric Vehicle Battery 72 Circuit Performance - AutoCodes.com — P1BBA Cadillac Code - Hybrid/Electric Vehicle Battery 72 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1BBA Cadillac?

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

How to Fix the DTC P1BBA 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 P1BBA 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 P1BBA Cadillac Code

1. What does the OBDII code P1BBA mean for a Cadillac?

The code P1BBA indicates a performance issue with the Hybrid/Electric Vehicle Battery 72 Circuit, typically related to voltage or communication faults in the battery management system.

2. What are the common symptoms of the P1BBA code?

Symptoms may include a check engine light, reduced vehicle performance, erratic battery charging behavior, or a warning message related to the hybrid system.

3. What causes the P1BBA code to appear?

Common causes include a malfunctioning battery module, damaged wiring or connectors in the battery circuit, or a fault in the battery control module.

4. Can I drive my Cadillac with the P1BBA code?

While the vehicle may still operate, driving with this code can result in reduced performance and potential damage to the hybrid system. Itâ€™s recommended to address the issue promptly.

5. How is the P1BBA code diagnosed?

A technician will use a scan tool to read the code, inspect the battery circuit components, and perform voltage and continuity tests to pinpoint the issue.

6. What repairs can fix the P1BBA code?

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

7. Is the P1BBA code specific to Cadillac vehicles?

While P1BBA is a manufacturer-specific code for Cadillac and other GM vehicles, similar codes may appear in hybrid/electric vehicles of other brands.

8. How much does it cost to fix the P1BBA code?

Repair costs vary depending on the issue, but they can range from $200 for minor wiring repairs to over $1,000 if battery components need replacement.

9. Can a weak 12V auxiliary battery cause the P1BBA code?

While less common, a weak or failing auxiliary battery can sometimes trigger hybrid system errors, so testing the 12V battery is a good diagnostic step.

10. Does the P1BBA code require a software update?

In some cases, a software update for the battery control module may resolve the issue, but this depends on the specific circumstances and diagnostic results.