AutoCodes – Saturn – P0B73 Saturn

P0B73 Saturn Code - Hybrid/Electric Vehicle Battery 12 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: P0B73 Saturn indicates Hybrid/Electric Vehicle Battery 12 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 859

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 P0B73 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 P0B73 Saturn - Hybrid/Electric Vehicle Battery 12 Circuit Performance - AutoCodes.com — P0B73 Saturn Code - Hybrid/Electric Vehicle Battery 12 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P0B73 Saturn?

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

How to Fix the DTC P0B73 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 P0B73 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 P0B73 Saturn Code

1. What are common symptoms of OBDII code P0B73 in a Saturn hybrid/electric vehicle?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, illuminated check engine light, and potential drivability issues.

2. What can cause the OBDII code P0B73 to trigger in a Saturn hybrid/electric vehicle?

- The code P0B73 is typically triggered by issues related to the 12-volt circuit within the hybrid/electric vehicle battery, such as wiring faults, battery pack deterioration, or faulty battery management system components.

3. How serious is the OBDII code P0B73 in a Saturn hybrid/electric vehicle?

- The code P0B73 should be addressed promptly to prevent further damage to the hybrid/electric vehicle battery system and ensure optimal vehicle performance and efficiency.

4. Can I continue driving my Saturn hybrid/electric vehicle with the OBDII code P0B73 present?

- It is not recommended to drive the vehicle with the code P0B73 present, as it may lead to further issues with the hybrid/electric system and potentially cause more significant problems.

5. How can I diagnose and repair the OBDII code P0B73 in my Saturn hybrid/electric vehicle?

- Proper diagnosis by a qualified technician using specialized diagnostic equipment is recommended to pinpoint the exact cause of the code. Repair may involve addressing wiring issues, replacing faulty components, or servicing the hybrid/electric battery.

6. Are there any DIY tips for troubleshooting the OBDII code P0B73 in a Saturn hybrid/electric vehicle?

- DIY troubleshooting is not recommended for the code P0B73 due to the complex nature of the hybrid/electric vehicle system. It is best to seek professional assistance to avoid causing further damage.

7. How much does it cost to repair the OBDII code P0B73 in a Saturn hybrid/electric vehicle?

- Repair costs for the code P0B73 can vary depending on the underlying issue, parts needed for replacement, and labor. It is advisable to obtain a quote from a trusted mechanic or dealership.

8. Can the OBDII code P0B73 be prevented in a Saturn hybrid/electric vehicle?

- Regular maintenance, including battery system checks and software updates, can help prevent issues that may trigger the code P0B73 in a Saturn hybrid/electric vehicle.

9. Will resetting the OBDII code P0B73 in my Saturn hybrid/electric vehicle make it go away permanently?

- Simply resetting the code without addressing the underlying issue will not make it go away permanently. It is crucial to diagnose and repair the root cause to prevent the code from reoccurring.

10. Is the OBDII code P0B73 specific to Saturn hybrid/electric vehicles, or can it occur in other makes and models?

- The OBDII code P0B73 related to Hybrid/Electric Vehicle Battery 12 Circuit Performance is specific to certain Saturn hybrid/electric vehicles and may not apply to other makes and models.