AutoCodes – Cadillac – P1BAB Cadillac

P1BAB Cadillac Code - Hybrid/Electric Vehicle Battery 67 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: P1BAB Cadillac indicates Hybrid/Electric Vehicle Battery 67 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 925

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 P1BAB 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 P1BAB Cadillac - Hybrid/Electric Vehicle Battery 67 Circuit Performance - AutoCodes.com — P1BAB Cadillac Code - Hybrid/Electric Vehicle Battery 67 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1BAB Cadillac?

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

How to Fix the DTC P1BAB 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 P1BAB 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 P1BAB Cadillac Code

What does the OBDII code P1BAB mean for a Cadillac vehicle?

The OBDII code P1BAB indicates a performance issue with the Hybrid/Electric Vehicle Battery 67 circuit, which may affect the vehicle's battery management system.

What are common symptoms associated with the P1BAB code?

Common symptoms include reduced engine power, warning lights on the dashboard, poor fuel economy, and potential issues with the hybrid system's performance.

What might cause the P1BAB code to trigger?

Causes can include a faulty battery management module, wiring issues in the battery circuit, poor connections, or a malfunctioning hybrid battery.

How can I diagnose the P1BAB code?

Start by using an OBDII scanner to confirm the code and check for any related codes. Inspect the wiring and connectors for damage, and test the hybrid battery for proper operation.

What repairs might be needed to fix the P1BAB code?

Repairs could involve replacing a faulty battery management module, repairing wiring issues, or, in some cases, replacing the hybrid battery itself.

Is it safe to drive a vehicle with the P1BAB code?

While it may be safe to drive, the vehicle may experience reduced performance and efficiency. It is advisable to have the issue diagnosed and repaired as soon as possible.

How can I prevent the P1BAB code from occurring?

Regular maintenance of the hybrid battery system, including checking connections and ensuring proper battery health, can help prevent issues that trigger the P1BAB code.

Can a weak hybrid battery cause the P1BAB code?

Yes, a weak or failing hybrid battery can lead to performance issues in the battery circuit, resulting in the P1BAB code being triggered.

Will clearing the P1BAB code fix the problem?

Clearing the code may temporarily turn off the warning light, but it will not fix the underlying issue. Proper diagnosis and repair are necessary to resolve the problem.