AutoCodes – Saturn – P0B45 Saturn

P0B45 Saturn Code - Hybrid/Electric Vehicle Battery 3 Circuit

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: P0B45 Saturn indicates Hybrid/Electric Vehicle Battery 3 Circuit.
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 964

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B45 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 P0B45 Saturn - Hybrid/Electric Vehicle Battery 3 Circuit - AutoCodes.com — P0B45 Saturn Code - Hybrid/Electric Vehicle Battery 3 Circuit

What does this mean?

What are the Possible Causes of the DTC P0B45 Saturn?

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

How to Fix the DTC P0B45 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 P0B45 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 P0B45 Saturn Code

1. What does OBDII code P0B45 mean on a Saturn?

P0B45 indicates a problem with the "Hybrid/Electric Vehicle Battery 3 Circuit," which refers to an issue with the electrical circuit for the third battery module in the hybrid or electric vehicle's battery pack.

2. What are the common symptoms of P0B45 in a Saturn?

Symptoms may include the hybrid system warning light turning on, reduced fuel efficiency, limited electric-only driving range, decreased vehicle performance, or the inability to start the car.

3. What causes the P0B45 code to appear?

Common causes include a faulty battery module, damaged wiring or connectors in the circuit, a malfunctioning battery management system, or an overheated or degraded battery module.

4. Can I still drive my Saturn with a P0B45 code?

Itâ€™s not recommended to drive with this code, as it may lead to further damage to the battery system or cause the vehicle to lose power unexpectedly.

5. How do I diagnose the P0B45 code?

Diagnosis involves scanning the vehicle with an OBDII tool, checking the battery module's voltage and temperature readings, inspecting the wiring and connectors, and performing tests on the battery management system.

6. How is the P0B45 code repaired?

Repairs may include replacing a faulty battery module, repairing or replacing damaged wiring or connectors, or reprogramming the battery management system if necessary.

7. How much does it cost to fix the P0B45 code?

The repair cost can vary widely depending on the issue, ranging from $100 for minor wiring repairs to over $1,000 for battery module replacement.

8. Can a low state of charge cause the P0B45 code?

While a low state of charge alone doesnâ€™t typically cause the code, it can exacerbate existing circuit issues, making it important to ensure the battery is properly charged during diagnostics.

9. Is the P0B45 code specific to Saturn vehicles?

No, the P0B45 code is a generic OBDII code applicable to all hybrid and electric vehicles, but the exact diagnostic and repair process may vary by manufacturer.

10. Can I reset the P0B45 code without fixing the problem?

While you can clear the code using an OBDII scanner, the issue will likely return unless the underlying problem is properly diagnosed and repaired.