AutoCodes – Saturn – P1B55 Saturn

P1B55 Saturn Code - Hybrid/Electric Vehicle Battery 38 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: P1B55 Saturn indicates Hybrid/Electric Vehicle Battery 38 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 820

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 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B55 Saturn 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 P1B55 Saturn - Hybrid/Electric Vehicle Battery 38 Circuit Low Voltage - AutoCodes.com — P1B55 Saturn Code - Hybrid/Electric Vehicle Battery 38 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B55 Saturn?

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

How to Fix the DTC P1B55 Saturn?

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 P1B55 Saturn 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 P1B55 Saturn Code

1. What are the common symptoms of OBDII code P1B55 in a Saturn Hybrid/Electric Vehicle?

- Common symptoms include reduced power, poor fuel efficiency, and difficulty starting the vehicle.

2. What could cause the Hybrid/Electric Vehicle Battery 38 Circuit Low Voltage code (P1B55) in a Saturn?

- Possible causes may include a faulty hybrid/electric vehicle battery, damaged wiring, or a malfunctioning battery management system.

3. How can I diagnose the P1B55 code in my Saturn Hybrid/Electric Vehicle?

- Diagnosing the code may involve using a diagnostic scanner to retrieve the specific fault codes, testing the hybrid/electric battery voltage, and inspecting the battery connections and wiring.

4. Can I still drive my Saturn with the P1B55 code present?

- It is not recommended to continue driving the vehicle with the P1B55 code as it may lead to further damage to the hybrid/electric system.

5. What are the potential repair options for correcting the Hybrid/Electric Vehicle Battery 38 Circuit Low Voltage code in a Saturn?

- Repair options may include replacing the hybrid/electric vehicle battery, repairing damaged wiring, or reprogramming the battery management system.

6. Is it safe to attempt DIY repairs for the P1B55 code in a Saturn Hybrid/Electric Vehicle?

- Due to the complexity of the hybrid/electric system, it is advisable to seek professional help for diagnosing and repairing the P1B55 code.

7. How important is it to address the P1B55 code promptly in a Saturn Hybrid/Electric Vehicle?

- Addressing the P1B55 code promptly is crucial to prevent further damage to the hybrid/electric system and ensure the vehicle's optimal performance.

8. Can environmental factors affect the occurrence of the P1B55 code in a Saturn Hybrid/Electric Vehicle?

- Extreme temperatures, humidity, or exposure to water can potentially impact the performance of the hybrid/electric system and trigger the P1B55 code.

9. Will resetting the OBDII system clear the P1B55 code in a Saturn Hybrid/Electric Vehicle?

- Resetting the OBDII system may temporarily clear the code, but it is essential to diagnose and address the underlying issue to prevent the code from reappearing.

10. How can regular maintenance help prevent the occurrence of the P1B55 code in a Saturn Hybrid/Electric Vehicle?

- Regular maintenance, including checking the hybrid/electric vehicle battery health, inspecting wiring connections, and monitoring system performance, can help prevent issues leading to the P1B55 code.