AutoCodes – Cadillac – P0B88 Cadillac

P0B88 Cadillac Code - Hybrid/Electric Vehicle Battery 16 Circuit Low Voltage

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: P0B88 Cadillac indicates Hybrid/Electric Vehicle Battery 16 Circuit Low Voltage.
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 963

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B88 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 P0B88 Cadillac - Hybrid/Electric Vehicle Battery 16 Circuit Low Voltage - AutoCodes.com — P0B88 Cadillac Code - Hybrid/Electric Vehicle Battery 16 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0B88 Cadillac?

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

How to Fix the DTC P0B88 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 P0B88 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 P0B88 Cadillac Code

What does the OBDII code P0B88 mean for a Cadillac hybrid vehicle?

The code P0B88 indicates a low voltage condition in the battery 16 circuit, which is part of the hybrid or electric vehicle battery system.

What are common symptoms of the P0B88 code?

Common symptoms may include a warning light on the dashboard, reduced vehicle performance, and potential issues with the hybrid system not engaging properly.

What could cause the P0B88 code to trigger?

Potential causes include a faulty battery management system, damaged wiring or connectors, or a failing hybrid battery.

Can I drive my Cadillac if the P0B88 code is active?

It's not recommended to drive the vehicle if the P0B88 code is present, as it may lead to further damage to the hybrid system or result in reduced performance.

How can I diagnose the P0B88 code?

You can start by using an OBDII scanner to confirm the code and check for related codes. Inspect the battery connections, wiring, and battery management system for faults.

What repairs are typically needed for the P0B88 code?

Repairs may involve replacing damaged wiring, repairing or replacing connectors, or potentially replacing the hybrid battery or battery management system if they are faulty.

Is it safe to reset the P0B88 code without fixing the problem?

Resetting the code without addressing the underlying issue is not advisable, as the problem will likely persist and could cause further damage.

How much does it typically cost to repair the issues related to the P0B88 code?

Repair costs can vary widely depending on the specific issue but can range from a few hundred to several thousand dollars, especially if a battery replacement is needed.

Can I perform any DIY checks before taking my Cadillac to a mechanic for the P0B88 code?

Yes, you can visually inspect the battery connections and wiring for any signs of damage, corrosion, or loose connections before seeking professional help.