AutoCodes – Saturn – P1B1B Saturn

P1B1B Saturn Code - Hybrid/Electric Vehicle Battery 28 Circuit High 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: P1B1B Saturn indicates Hybrid/Electric Vehicle Battery 28 Circuit High 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 747

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 P1B1B 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 P1B1B Saturn - Hybrid/Electric Vehicle Battery 28 Circuit High Voltage - AutoCodes.com — P1B1B Saturn Code - Hybrid/Electric Vehicle Battery 28 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B1B Saturn?

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

How to Fix the DTC P1B1B 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 P1B1B 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 P1B1B Saturn Code

1. What does the OBDII code P1B1B mean on a Saturn?

P1B1B indicates a "Hybrid/Electric Vehicle Battery 28 Circuit High Voltage," meaning the vehicle's control module has detected an abnormally high voltage in battery circuit 28.

2. What are the symptoms of code P1B1B in a Saturn?

Common symptoms include reduced hybrid or electric performance, limited charging capability, warning lights on the dashboard, and potential vehicle shutdowns.

3. What causes the P1B1B code to appear?

This code can be caused by a faulty hybrid battery cell, damaged wiring or connectors in the battery circuit, a malfunctioning battery control module, or an internal short in the battery pack.

4. Can I drive my Saturn with the P1B1B code?

It is not recommended to drive the vehicle with this code active, as it could lead to further damage to the battery system or cause the vehicle to enter a limp mode.

5. How do you diagnose the P1B1B code?

A technician will use a scan tool to confirm the code, inspect battery wiring and connectors for damage, test individual battery cells for voltage irregularities, and check the battery control module for faults.

6. How is the P1B1B code fixed?

Repairs may include replacing damaged wiring or connectors, repairing or replacing the hybrid battery, or reprogramming or replacing the battery control module.

7. What is the cost to fix the P1B1B code on a Saturn?

Repair costs vary widely, ranging from $100 for minor wiring repairs to upwards of $3,000 for a battery replacement, depending on the vehicle model and battery condition.

8. Can a weak 12-volt battery cause the P1B1B code?

While unlikely, a weak 12-volt battery can sometimes create communication issues that trigger similar codes. Itâ€™s best to rule out 12-volt battery problems during diagnosis.

9. Does the P1B1B code mean the hybrid battery needs replacement?

Not necessarily. The issue could be isolated to a specific circuit or component. Proper diagnosis is required to determine if the whole battery needs replacement or just a repair.

10. Can clearing the P1B1B code fix the problem?

Clearing the code without addressing the root cause will not fix the problem. The code will likely reappear if the underlying issue is not resolved.