AutoCodes – Generic – P1B88

P1B88 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 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 3,599

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

What does this mean?

What are the Possible Causes of the DTC P1B88?

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

How to Fix the DTC P1B88?

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 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?

Get the P1B88 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1B88 Buick — Hybrid/Electric Vehicle Battery 55 Circuit Low Voltage
P1B88 Cadillac — Hybrid/Electric Vehicle Battery 55 Circuit Low Voltage
P1B88 Chevrolet — Hybrid/Electric Vehicle Battery 55 Circuit Low Voltage
P1B88 GMC — Hybrid/Electric Vehicle Battery 55 Circuit Low Voltage
P1B88 Saturn — Hybrid/Electric Vehicle Battery 55 Circuit Low 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 P1B88 Code

1. What are common symptoms of OBDII code P1B88 (Hybrid/Electric Vehicle Battery 55 Circuit Low Voltage)?

- Common symptoms include decreased electric vehicle range, poor fuel efficiency, and difficulty starting the vehicle.

2. What are the possible causes of OBDII code P1B88?

- The code may be triggered by issues such as a weak or failing hybrid/electric vehicle battery, loose battery connections, or a faulty battery management system.

3. How serious is OBDII code P1B88?

- This code is considered serious as it can impact the performance and efficiency of the hybrid/electric vehicle. It is recommended to address the issue promptly to avoid further complications.

4. Can OBDII code P1B88 be temporarily reset?

- While clearing the code may temporarily disable the check engine light, it is important to diagnose and address the underlying issue causing the code to prevent future problems.

5. What are some repair tips for fixing OBDII code P1B88?

- Repair tips may include checking and tightening battery connections, testing the hybrid/electric vehicle battery for health, and diagnosing the battery management system for faults.

6. How can I prevent OBDII code P1B88 from recurring?

- To prevent the code from recurring, it is essential to maintain the hybrid/electric vehicle battery in good condition, regularly inspect battery connections, and address any underlying issues promptly.

7. Is it safe to continue driving with OBDII code P1B88?

- It is not recommended to continue driving with this code as it can affect the performance and safety of the hybrid/electric vehicle. It is best to address the issue as soon as possible.

8. Can OBDII code P1B88 be diagnosed and repaired at home?

- While basic diagnostics like checking battery connections can be done at home, diagnosing and repairing complex issues related to the hybrid/electric vehicle system may require professional assistance.

9. How much does it typically cost to repair OBDII code P1B88?

- The cost of repairing this code can vary depending on the underlying issue and the extent of the repair needed. Costs may range from a simple battery connection fix to a battery replacement or system repair.

10. Will OBDII code P1B88 affect the warranty of my hybrid/electric vehicle?

- It is important to consult with the vehicle manufacturer or dealership to determine if the issue triggering this code is covered under warranty. Failure to address the code promptly may void certain warranty coverage.