AutoCodes – Saturn – P1B66 Saturn

P1B66 Saturn Code - Hybrid/Electric Vehicle Battery 44 Circuit Performance

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: P1B66 Saturn indicates Hybrid/Electric Vehicle Battery 44 Circuit Performance.
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 1,068

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 P1B66 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 P1B66 Saturn - Hybrid/Electric Vehicle Battery 44 Circuit Performance - AutoCodes.com — P1B66 Saturn Code - Hybrid/Electric Vehicle Battery 44 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B66 Saturn?

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

How to Fix the DTC P1B66 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 P1B66 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 P1B66 Saturn Code

1. What are the common symptoms of OBDII code P1B66 Saturn for Hybrid/Electric Vehicle Battery 44 Circuit Performance?

The common symptoms include poor performance of the hybrid/electric vehicle, decreased fuel efficiency, and potential warning lights on the dashboard.

2. What are the possible causes of OBDII code P1B66 Saturn related to Hybrid/Electric Vehicle Battery 44 Circuit Performance?

Possible causes include a malfunctioning battery pack, issues with the battery management system, faulty wiring or connectors, or software glitches.

3. How can I diagnose the OBDII code P1B66 Saturn for Hybrid/Electric Vehicle Battery 44 Circuit Performance?

Diagnosing this code typically involves using a professional OBDII scanner to retrieve the specific trouble codes, conducting a thorough inspection of the battery system, checking for loose connections or damaged wiring, and performing a battery health assessment.

4. Can I still drive my vehicle with the OBDII code P1B66 Saturn present?

It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the hybrid/electric system. It is best to have the issue diagnosed and repaired as soon as possible.

5. How can I reset the OBDII code P1B66 Saturn for Hybrid/Electric Vehicle Battery 44 Circuit Performance?

Resetting the code typically involves using an OBDII scanner to clear the code after the underlying issue has been addressed and repaired. Simply clearing the code without fixing the problem will likely result in the code reappearing.

6. Is it safe to attempt DIY repairs for the OBDII code P1B66 Saturn related to Hybrid/Electric Vehicle Battery 44 Circuit Performance?

Due to the complexities of hybrid/electric vehicle systems and the potential dangers involved, it is recommended to seek professional help for diagnosing and repairing this code to ensure safety and proper functionality of the vehicle.

7. What are some repair tips for addressing OBDII code P1B66 Saturn on a Saturn hybrid/electric vehicle?

Some repair tips include checking and tightening all battery connections, inspecting the wiring harness for any signs of damage, ensuring proper battery cooling system operation, and updating software as recommended by the manufacturer.

8. How much does it typically cost to repair OBDII code P1B66 Saturn for Hybrid/Electric Vehicle Battery 44 Circuit Performance?

The cost of repairs can vary depending on the underlying issue causing the code, the extent of the damage, and whether any parts need to be replaced. It is advisable to consult a professional mechanic for an accurate estimate.

9. Can a faulty sensor trigger the OBDII code P1B66 Saturn for Hybrid/Electric Vehicle Battery 44 Circuit Performance?

Yes, a faulty sensor related to the hybrid/electric vehicle battery system, such as a temperature sensor or voltage sensor, can potentially trigger this code. It is important to diagnose the specific cause accurately to address the issue effectively.

10. How often should I have the battery system of my Saturn hybrid/electric vehicle inspected to prevent OBDII code P1B66 Saturn issues?

Regular maintenance and inspections of the battery system, as recommended by the manufacturer, can help prevent issues leading to the OBDII code P1B66 Saturn. It is advisable to follow the maintenance schedule provided in the vehicle's manual.