AutoCodes – Cadillac – P1BB1 Cadillac

P1BB1 Cadillac Code - Hybrid/Electric Vehicle Battery 69 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: P1BB1 Cadillac indicates Hybrid/Electric Vehicle Battery 69 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 1,284

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 P1BB1 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 P1BB1 Cadillac - Hybrid/Electric Vehicle Battery 69 Circuit Performance - AutoCodes.com — P1BB1 Cadillac Code - Hybrid/Electric Vehicle Battery 69 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1BB1 Cadillac?

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

How to Fix the DTC P1BB1 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 P1BB1 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 P1BB1 Cadillac Code

What does the OBDII code P1BB1 mean for a Cadillac vehicle?

The OBDII code P1BB1 indicates a performance issue with the Hybrid/Electric Vehicle Battery 69 circuit, which can affect the vehicle's ability to operate efficiently in hybrid or electric mode.

What are the common symptoms of the P1BB1 code?

Common symptoms may include reduced power or acceleration, warning lights on the dashboard (such as the check engine light), and decreased fuel efficiency.

What could cause the P1BB1 code to trigger?

The code can be triggered by issues such as a faulty battery management system, wiring problems, bad connectors, or a failing hybrid battery pack.

How can I diagnose the P1BB1 code?

To diagnose the P1BB1 code, use an OBDII scanner to read the code and any associated codes. Inspect the battery management system, wiring, and connections for damage or corrosion.

What repairs are recommended for the P1BB1 code?

Recommended repairs may include replacing damaged wiring or connectors, repairing or replacing the battery management system, or replacing the hybrid battery if necessary.

Can I continue driving my Cadillac if the P1BB1 code is active?

It's not advisable to continue driving the vehicle with this code, as it may lead to decreased performance and could potentially cause further damage to the hybrid system.

How can I reset the P1BB1 code after repairs?

After completing the necessary repairs, you can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a short period, but ensure that the underlying issue has been resolved first.

Is the P1BB1 code specific to Cadillac vehicles?

While the P1BB1 code can appear in Cadillac vehicles, it is part of a wider set of codes related to hybrid and electric vehicles and may be found in other brands as well.

Are there any preventive measures to avoid the P1BB1 code?

Regular maintenance of the hybrid system, including checking battery connections and the battery management system, can help prevent issues that lead to the P1BB1 code.