AutoCodes – Cadillac – P1B6C Cadillac

P1B6C Cadillac Code - Hybrid/Electric Vehicle Battery 46 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: P1B6C Cadillac indicates Hybrid/Electric Vehicle Battery 46 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 903

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 P1B6C 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 P1B6C Cadillac - Hybrid/Electric Vehicle Battery 46 Circuit Performance - AutoCodes.com — P1B6C Cadillac Code - Hybrid/Electric Vehicle Battery 46 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B6C Cadillac?

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

How to Fix the DTC P1B6C 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 P1B6C 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 P1B6C Cadillac Code

What does the OBDII code P1B6C mean for my Cadillac?

The OBDII code P1B6C indicates a performance issue with the hybrid/electric vehicle battery's 46 circuit. This often relates to the battery management system's inability to properly monitor or regulate battery performance.

What are the common symptoms of the P1B6C code?

Common symptoms may include reduced power output, diminished fuel efficiency, warning lights on the dashboard (such as the Check Engine Light), and potential issues with the vehicle entering a reduced power mode.

What could cause the P1B6C code to trigger?

Possible causes include faulty battery connectors, damaged wiring in the battery circuit, a malfunctioning battery management system, or issues with the hybrid battery itself.

How can I diagnose the P1B6C code?

To diagnose the P1B6C code, use an OBDII scanner to confirm the code and check for any related codes. Inspect the battery connections, wiring, and components for damage or corrosion, and test the battery's voltage and performance.

What repairs might be needed for the P1B6C code?

Repairs may involve cleaning or replacing corroded connectors, repairing damaged wiring, replacing the battery management system, or, in some cases, replacing the hybrid battery if it is found to be faulty.

Can I continue to drive my Cadillac with the P1B6C code?

While it may be possible to drive with the P1B6C code, it is not recommended as it can lead to reduced vehicle performance and could potentially cause further damage to the hybrid system.

Is the P1B6C code specific to Cadillac vehicles?

No, the P1B6C code is a generic OBDII code that can apply to various hybrid and electric vehicles, not just Cadillacs. However, the specifics of the issue may vary between different makes and models.

How much does it typically cost to repair the P1B6C code?

Repair costs can vary widely depending on the specific issue. Simple fixes like cleaning connectors may cost less than $100, while more extensive repairs involving battery replacement or management system repairs can range from a few hundred to several thousand dollars.

Are there any preventive measures to avoid the P1B6C code?

Regular maintenance of your hybrid vehicle, including battery inspections and ensuring all connections are clean and secure, can help prevent issues related to the P1B6C code. Additionally, addressing any warning lights promptly can prevent further complications.