AutoCodes – Saturn – P0BAF Saturn

P0BAF Saturn Code - Hybrid/Electric Vehicle Battery 24 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: P0BAF Saturn indicates Hybrid/Electric Vehicle Battery 24 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 851

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 P0BAF 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 P0BAF Saturn - Hybrid/Electric Vehicle Battery 24 Circuit Performance - AutoCodes.com — P0BAF Saturn Code - Hybrid/Electric Vehicle Battery 24 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P0BAF Saturn?

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

How to Fix the DTC P0BAF 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 P0BAF 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 P0BAF Saturn Code

1. What does the OBDII code P0BAF mean for a Saturn vehicle?

The P0BAF code indicates a performance issue with Battery 24 in the hybrid or electric vehicle's battery circuit, commonly related to voltage or communication problems.

2. What are the common symptoms of the P0BAF code?

Symptoms may include a check engine light, reduced fuel efficiency, limited EV mode functionality, or a warning on the hybrid system display.

3. What causes the P0BAF code in a Saturn hybrid or electric vehicle?

Causes can include a faulty battery module, poor wiring connections, corrosion in the circuit, or an issue with the battery control module.

4. Can I drive my Saturn with the P0BAF code active?

It is possible to drive, but it is not recommended as it may lead to further damage to the hybrid battery system or reduce performance.

5. How is the P0BAF code diagnosed?

A technician will use a scan tool to check voltage readings for Battery 24, inspect the wiring and connections, and test the battery control module for faults.

6. What repairs are commonly needed to fix the P0BAF code?

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

7. How much does it cost to fix the P0BAF code on a Saturn hybrid?

Repair costs can range from $200 to $1,500 or more, depending on whether the issue is wiring-related or requires replacing a battery module.

8. Can a weak 12V battery cause the P0BAF code?

While unlikely, a weak 12V battery can sometimes affect the hybrid systemâ€™s diagnostics, so itâ€™s worth checking and replacing if necessary.

9. How can I prevent the P0BAF code from reoccurring?

Regular maintenance of the vehicle's electrical system, ensuring clean and secure battery connections, and addressing hybrid system issues promptly can help prevent this code.

10. Does the P0BAF code indicate a total failure of the hybrid battery?

Not necessarily. The code points to a specific issue with Battery 24's circuit performance, which may or may not require full battery replacement.