AutoCodes – GMC – P1B88 GMC

P1B88 GMC Code - Hybrid/Electric Vehicle Battery 55 Circuit Low 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: P1B88 GMC indicates Hybrid/Electric Vehicle Battery 55 Circuit Low 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 831

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 P1B88 GMC 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 P1B88 GMC - Hybrid/Electric Vehicle Battery 55 Circuit Low Voltage - AutoCodes.com — P1B88 GMC Code - Hybrid/Electric Vehicle Battery 55 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B88 GMC?

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

How to Fix the DTC P1B88 GMC?

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 P1B88 GMC 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 P1B88 GMC Code

1. What are the common symptoms of OBDII code P1B88 GMC related to Hybrid/Electric Vehicle Battery 55 Circuit Low Voltage?

- Common symptoms include reduced electric vehicle range, poor battery performance, and potential warning lights on the dashboard.

2. What are the possible causes of OBDII code P1B88 GMC indicating Hybrid/Electric Vehicle Battery 55 Circuit Low Voltage?

- The code may be triggered by issues such as a faulty battery cell, damaged wiring, loose connections, or a malfunctioning battery management system.

3. How can I diagnose the OBDII code P1B88 GMC for Hybrid/Electric Vehicle Battery 55 Circuit Low Voltage?

- Diagnosis typically involves using a diagnostic scanner to read the code, inspecting the battery system for physical damage, and testing the voltage levels across the circuit.

4. Is it safe to continue driving with OBDII code P1B88 GMC related to Hybrid/Electric Vehicle Battery 55 Circuit Low Voltage?

- It is not advisable to continue driving with this code active, as it can lead to further damage to the battery system and potentially leave you stranded due to power loss.

5. Can I reset the OBDII code P1B88 GMC for Hybrid/Electric Vehicle Battery 55 Circuit Low Voltage on my own?

- While you can clear the code with a diagnostic scanner, it is crucial to address the underlying issue causing the low voltage to prevent the code from reoccurring.

6. How can I repair OBDII code P1B88 GMC for Hybrid/Electric Vehicle Battery 55 Circuit Low Voltage?

- Repair options may include replacing a faulty battery cell, repairing damaged wiring, tightening loose connections, or recalibrating the battery management system.

7. Are there any maintenance tips to prevent OBDII code P1B88 GMC related to Hybrid/Electric Vehicle Battery 55 Circuit Low Voltage?

- Regularly inspecting the battery system, keeping connections clean and secure, and following the manufacturer's maintenance schedule can help prevent this code from appearing.

8. Can extreme weather conditions contribute to triggering OBDII code P1B88 GMC for Hybrid/Electric Vehicle Battery 55 Circuit Low Voltage?

- Yes, extreme hot or cold temperatures can affect battery performance and voltage levels, potentially leading to the triggering of this code.

9. How much does it typically cost to repair OBDII code P1B88 GMC for Hybrid/Electric Vehicle Battery 55 Circuit Low Voltage?

- Repair costs can vary depending on the specific issue causing the low voltage, but it is advisable to consult with a professional technician for an accurate estimate.

10. Is the OBDII code P1B88 GMC indicating Hybrid/Electric Vehicle Battery 55 Circuit Low Voltage a common issue in electric vehicles?

- While not extremely common, issues related to low voltage in electric vehicle batteries can occur and should be addressed promptly to ensure optimal performance and safety.