AutoCodes – Chevrolet – P1B8C Chevrolet

P1B8C Chevrolet Code - Hybrid/Electric Vehicle Battery 56 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: P1B8C Chevrolet indicates Hybrid/Electric Vehicle Battery 56 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 815

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 P1B8C Chevrolet 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 P1B8C Chevrolet - Hybrid/Electric Vehicle Battery 56 Circuit High Voltage - AutoCodes.com — P1B8C Chevrolet Code - Hybrid/Electric Vehicle Battery 56 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B8C Chevrolet?

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

How to Fix the DTC P1B8C Chevrolet?

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 P1B8C Chevrolet 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 P1B8C Chevrolet Code

1. What are common symptoms of OBDII code P1B8C in a Chevrolet Hybrid/Electric Vehicle?

- Common symptoms include reduced vehicle performance, decreased fuel efficiency, and potential illumination of the check engine light.

2. What can cause the OBDII code P1B8C in a Chevrolet Hybrid/Electric Vehicle?

- The code P1B8C typically indicates a high voltage issue in the Hybrid/Electric Vehicle Battery 56 Circuit, which could be caused by a malfunctioning battery cell, damaged wiring, or a faulty battery management system.

3. How serious is the OBDII code P1B8C in a Chevrolet Hybrid/Electric Vehicle?

- This code should be addressed promptly as it can affect the overall performance and efficiency of the vehicle. Ignoring the issue may lead to further damage to the battery system.

4. What should I do if my Chevrolet Hybrid/Electric Vehicle displays the OBDII code P1B8C?

- It is recommended to have the vehicle diagnosed by a qualified technician with experience in hybrid/electric vehicles to determine the exact cause of the high voltage circuit issue.

5. Can I continue driving my Chevrolet Hybrid/Electric Vehicle with the OBDII code P1B8C?

- It is not advisable to continue driving the vehicle with this code present, as it can lead to potential safety hazards and further damage to the battery system.

6. How can I repair the OBDII code P1B8C in my Chevrolet Hybrid/Electric Vehicle?

- Repair options may include replacing a faulty battery cell, repairing damaged wiring, or recalibrating the battery management system. It is best to consult a professional for the most appropriate repair strategy.

7. Is it possible to reset the OBDII code P1B8C in a Chevrolet Hybrid/Electric Vehicle?

- While clearing the code may temporarily turn off the check engine light, it is essential to address the underlying issue causing the high voltage circuit problem to prevent future occurrences.

8. Can extreme weather conditions contribute to the OBDII code P1B8C in a Chevrolet Hybrid/Electric Vehicle?

- Yes, extreme temperatures can impact the performance of the battery system and potentially trigger high voltage circuit issues. Proper battery maintenance and temperature control are crucial for optimal operation.

9. How can I prevent the OBDII code P1B8C from appearing in my Chevrolet Hybrid/Electric Vehicle?

- Regular maintenance, including battery inspections and ensuring proper charging habits, can help prevent issues that may trigger the high voltage circuit code P1B8C.

10. Are there any recalls or technical service bulletins related to the OBDII code P1B8C in Chevrolet Hybrid/Electric Vehicles?

- It is recommended to check with Chevrolet authorized service centers or visit the manufacturer's website to inquire about any specific recalls or technical service bulletins related to this code.