AutoCodes – Chevrolet – P1B1D Chevrolet

P1B1D Chevrolet Code - Hybrid/Electric Vehicle Battery 29 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: P1B1D Chevrolet indicates Hybrid/Electric Vehicle Battery 29 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 868

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B1D 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 P1B1D Chevrolet - Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage - AutoCodes.com — P1B1D Chevrolet Code - Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B1D Chevrolet?

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

How to Fix the DTC P1B1D 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 P1B1D 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 P1B1D Chevrolet Code

What does OBDII code P1B1D mean for a Chevrolet vehicle?

OBDII code P1B1D indicates a low voltage condition in the Hybrid/Electric Vehicle Battery 29 circuit, which can affect the vehicle's hybrid system performance.

What are common symptoms associated with code P1B1D?

Common symptoms may include warning lights on the dashboard, reduced power or acceleration, decreased fuel efficiency, and the vehicle may enter limp mode.

What could cause the P1B1D code to trigger?

Possible causes include a weak or failing hybrid battery, poor electrical connections in the battery circuit, damaged wiring, or issues with the battery management system.

How can I diagnose the issue related to code P1B1D?

To diagnose the issue, check the battery voltage, inspect wiring and connectors for damage, test the hybrid battery's condition, and use a scan tool to monitor battery performance.

Is it safe to drive a vehicle with the P1B1D code?

While it may be possible to drive the vehicle, it is not advisable as the hybrid system may not function properly, potentially leading to further damage or safety concerns.

What repairs are typically needed to fix the P1B1D code?

Repairs may involve replacing the hybrid battery, repairing or replacing damaged wiring or connectors, or addressing issues with the battery management system.

How can I prevent the P1B1D code from occurring in the future?

Regular maintenance of the hybrid system, ensuring good electrical connections, and monitoring the battery's health can help prevent this code from recurring.

Should I reset the code after repairs?

Yes, after completing the necessary repairs, you should clear the code with a scan tool and conduct a test drive to ensure that the issue has been resolved.

What is the typical cost to repair the P1B1D code?

Repair costs can vary widely depending on the specific issue, but battery replacement can be expensive, often ranging from $1,000 to $3,500, depending on the vehicle model and battery type.