AutoCodes – Cadillac – P0B46 Cadillac

P0B46 Cadillac Code - Hybrid/Electric Vehicle Battery 3 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: P0B46 Cadillac indicates Hybrid/Electric Vehicle Battery 3 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 795

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0B46 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 P0B46 Cadillac - Hybrid/Electric Vehicle Battery 3 Circuit Performance - AutoCodes.com — P0B46 Cadillac Code - Hybrid/Electric Vehicle Battery 3 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P0B46 Cadillac?

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

How to Fix the DTC P0B46 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 P0B46 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.

Need more information about the P0B46 Cadillac code?

Need more information on how to fix the P0B46 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0B46 Cadillac code diagnosed by a professional: Find a repair shop in your area

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 P0B46 Cadillac Code

What does the OBDII code P0B46 mean on a Cadillac?

The P0B46 code indicates a performance issue in the Hybrid/Electric Vehicle Battery 3 Circuit, which monitors the third battery block's operation in the hybrid or electric system.

What are the common symptoms of code P0B46?

Symptoms may include a check engine light, reduced fuel efficiency, vehicle entering limp mode, limited electric power, or difficulty charging the hybrid battery.

What causes the P0B46 code to be triggered?

Common causes include a faulty battery cell, damaged wiring or connectors in the circuit, a malfunctioning battery control module, or corrosion affecting the connections.

Can I still drive my Cadillac with the P0B46 code?

It is not recommended to drive for extended periods with this code, as it may lead to further damage to the hybrid system and reduced performance of the vehicle.

How can you diagnose the P0B46 code?

Diagnosis involves using an OBDII scanner to confirm the code, inspecting the battery and related wiring, testing the battery control module, and checking for signs of corrosion or physical damage.

What repairs are commonly needed to fix the P0B46 code?

Repairs may include replacing damaged wiring, cleaning corroded terminals, repairing or replacing the affected battery cell, or replacing the battery control module if itâ€™s faulty.

Does the P0B46 code mean the battery needs replacement?

Not always; the issue could be related to wiring, connectors, or the control module. A thorough diagnosis is necessary to determine if the battery itself is at fault.

How much does it cost to fix the P0B46 code?

Repair costs vary depending on the issue, ranging from $100 to fix wiring issues to over $1,000 if the battery or control module requires replacement.

Can a low battery state of charge trigger the P0B46 code?

Yes, if the batteryâ€™s state of charge is too low, it can affect circuit performance and trigger this code. Recharging the battery may temporarily resolve the issue.

Is the P0B46 code covered under Cadillacâ€™s hybrid system warranty?

In many cases, hybrid system components, including the battery and control module, are covered under a longer warranty. Check your Cadillacâ€™s warranty terms for specific coverage details.