AutoCodes – Generic – P1B6E

P1B6E Code - Hybrid/Electric Vehicle Battery 46 Circuit High 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: P1B6E indicates Hybrid/Electric Vehicle Battery 46 Circuit High 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 1,191

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 P1B6E 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 P1B6E - Hybrid/Electric Vehicle Battery 46 Circuit High Voltage - AutoCodes.com — P1B6E Code - Hybrid/Electric Vehicle Battery 46 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B6E?

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

How to Fix the DTC P1B6E?

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 P1B6E 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 P1B6E code?

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Need Help with the Code?

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Information for Specific Makes

P1B6E Buick — Hybrid/Electric Vehicle Battery 46 Circuit High Voltage
P1B6E Cadillac — Hybrid/Electric Vehicle Battery 46 Circuit High Voltage
P1B6E Chevrolet — Hybrid/Electric Vehicle Battery 46 Circuit High Voltage
P1B6E GMC — Hybrid/Electric Vehicle Battery 46 Circuit High Voltage
P1B6E Saturn — Hybrid/Electric Vehicle Battery 46 Circuit High Voltage

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 P1B6E Code

1. What does the OBDII code P1B6E mean?

P1B6E indicates a high voltage issue in the circuit related to battery 46 in a hybrid or electric vehicle, which could signal an electrical imbalance or fault.

2. What are the common symptoms of code P1B6E?

Symptoms may include an illuminated check engine light, reduced vehicle performance, limited EV mode functionality, or warning messages on the dashboard.

3. What causes the P1B6E code to appear?

Common causes include damaged high-voltage wiring, a faulty battery module, poor electrical connections, or issues with the battery control module.

4. Can I drive my vehicle with a P1B6E code?

Itâ€™s not recommended to drive with this code active, as it may lead to further damage or reduced performance in your hybrid or electric system.

5. How is the P1B6E code diagnosed?

A technician will use a scan tool to confirm the code, inspect the high-voltage battery circuit, check for damaged wiring, and test the functionality of the battery control module.

6. Can a low 12V battery cause the P1B6E code?

While unlikely, a weak 12V battery can sometimes lead to communication errors that trigger high-voltage fault codes.

7. How do you fix the P1B6E code?

Repairs may include replacing damaged wiring, repairing or replacing the affected battery module, or reprogramming the battery control module if necessary.

8. How much does it cost to repair the P1B6E code?

Repair costs can vary widely, but fixing high-voltage battery issues may range from $500 to $5,000 depending on the specific fault and labor costs.

9. Can I clear the P1B6E code myself?

You can clear the code with an OBDII scanner, but it will likely return if the underlying issue isnâ€™t resolved.

10. Is the P1B6E code specific to certain vehicles?

Yes, this code is specific to hybrid and electric vehicles and may only apply to certain models or manufacturers. Always consult your vehicleâ€™s service manual for accurate details.