AutoCodes – Generic – P1B68

P1B68 Code - Hybrid/Electric Vehicle Battery 44 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: P1B68 indicates Hybrid/Electric Vehicle Battery 44 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 1,845

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 P1B68 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 P1B68 - Hybrid/Electric Vehicle Battery 44 Circuit High Voltage - AutoCodes.com — P1B68 Code - Hybrid/Electric Vehicle Battery 44 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B68?

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

How to Fix the DTC P1B68?

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 P1B68 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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Need Help with the Code?

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Information for Specific Makes

P1B68 Buick — Hybrid/Electric Vehicle Battery 44 Circuit High Voltage
P1B68 Cadillac — Hybrid/Electric Vehicle Battery 44 Circuit High Voltage
P1B68 Chevrolet — Hybrid/Electric Vehicle Battery 44 Circuit High Voltage
P1B68 GMC — Hybrid/Electric Vehicle Battery 44 Circuit High Voltage
P1B68 Saturn — Hybrid/Electric Vehicle Battery 44 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 P1B68 Code

1. What are the common symptoms of OBDII code P1B68 (Hybrid/Electric Vehicle Battery 44 Circuit High Voltage)?

- Common symptoms include the hybrid or electric vehicle not starting, loss of power, and the warning light illuminating on the dashboard.

2. What are the possible causes of OBDII code P1B68?

- The code P1B68 can be triggered by issues such as a faulty high voltage battery pack, damaged battery wiring, or a malfunctioning battery management system.

3. How can I diagnose the OBDII code P1B68?

- Diagnosing code P1B68 typically involves using a scan tool to retrieve the specific fault codes, checking the high voltage battery system for visible damage, and testing the battery voltage and connections.

4. Can I continue driving my vehicle with OBDII code P1B68 present?

- It is not recommended to drive the vehicle with code P1B68 present, as it indicates a potential high voltage issue that could be hazardous. It is best to have the vehicle inspected and repaired by a qualified technician.

5. What are some repair tips for fixing OBDII code P1B68?

- Repair tips may include inspecting and repairing damaged wiring, replacing the high voltage battery pack if necessary, and resetting the fault codes after the repairs are completed.

6. Is it safe to attempt DIY repairs for OBDII code P1B68?

- Due to the high voltage nature of the hybrid or electric vehicle system, it is not recommended for untrained individuals to attempt DIY repairs for code P1B68. It is best to seek professional assistance.

7. How much does it cost to repair OBDII code P1B68?

- The cost of repairing code P1B68 can vary depending on the specific issue causing the fault code. It is recommended to obtain a diagnosis from a qualified technician to determine the exact repair cost.

8. Can a low battery voltage trigger OBDII code P1B68?

- Yes, a low battery voltage can sometimes trigger code P1B68, as it may indicate issues with the high voltage battery pack or the battery management system.

9. How quickly should I address OBDII code P1B68?

- It is important to address code P1B68 promptly to prevent any potential safety hazards associated with high voltage systems in hybrid or electric vehicles.

10. Are there any precautions I should take when dealing with OBDII code P1B68?

- When dealing with code P1B68, it is important to follow safety precautions related to high voltage systems, such as wearing appropriate protective gear and disconnecting the battery before attempting any repairs.