AutoCodesSaturn – P1BC2 Saturn

P1BC2 Saturn Code - Hybrid/Electric Vehicle Battery 74 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
P1BC2 Saturn indicates Hybrid/Electric Vehicle Battery 74 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 865
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 12, 2020
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Code P1BC2 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 P1BC2 Saturn - Hybrid/Electric Vehicle Battery 74 Circuit High Voltage - AutoCodes.com
P1BC2 Saturn Code - Hybrid/Electric Vehicle Battery 74 Circuit High Voltage

What are the Possible Causes of the DTC P1BC2 Saturn?

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

How to Fix the DTC P1BC2 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 P1BC2 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 P1BC2 Saturn Code

What does the OBDII code P1BC2 mean on a Saturn?

The P1BC2 code indicates a problem with the hybrid/electric vehicle battery, specifically a high voltage issue in circuit 74.

What are common symptoms of the P1BC2 code?

Symptoms may include warning lights on the dashboard, reduced hybrid performance, poor fuel economy, or limited electric mode functionality.

What causes the P1BC2 code to appear?

The code is often caused by issues such as a faulty battery control module, damaged wiring in circuit 74, or a malfunctioning hybrid battery cell.

How is the P1BC2 code diagnosed?

A technician will use a scan tool to confirm the code, inspect the battery system wiring, test the hybrid battery cells, and evaluate the battery control module for faults.

Can driving with the P1BC2 code damage my Saturn?

Driving with this code may lead to further damage to the hybrid battery system or reduced overall vehicle performance, so it’s best to address the issue promptly.

How do you fix the P1BC2 code?

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

Is the P1BC2 code specific to Saturn vehicles?

While the code is not exclusive to Saturn, its meaning and relevance may vary depending on the manufacturer and hybrid system design.

Can a weak 12-volt battery cause the P1BC2 code?

A weak 12-volt battery is unlikely to directly cause this code, but it’s still important to ensure all electrical systems are functioning properly during diagnosis.

What tools are needed to fix the P1BC2 code?

Tools may include an OBDII scanner, a multimeter for testing voltage, and manufacturer-specific diagnostic software for hybrid systems.

How much does it cost to repair the P1BC2 code on a Saturn?

Repair costs can vary widely, ranging from $200 for wiring repairs to over $2,000 if the hybrid battery needs replacement.

Discuss the causes and fixes for P1BC2 Saturn OBDII Code

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