AutoCodes – Saturn – P1BAA Saturn

P1BAA Saturn Code - Hybrid/Electric Vehicle Battery 66 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: P1BAA Saturn indicates Hybrid/Electric Vehicle Battery 66 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 861

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 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1BAA 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 P1BAA Saturn - Hybrid/Electric Vehicle Battery 66 Circuit High Voltage - AutoCodes.com — P1BAA Saturn Code - Hybrid/Electric Vehicle Battery 66 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BAA Saturn?

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

How to Fix the DTC P1BAA 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 P1BAA 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 P1BAA Saturn Code

1. What does the OBDII code P1BAA mean on a Saturn vehicle?

P1BAA indicates a problem with the Hybrid/Electric Vehicle Battery 66 Circuit, specifically a high voltage issue detected in the battery system.

2. What are common symptoms of the P1BAA code on a Saturn?

Symptoms may include an illuminated check engine light, reduced fuel efficiency, limited hybrid/electric performance, or the vehicle entering limp mode.

3. What causes the P1BAA code in a Saturn?

The code is typically triggered by a fault in the high-voltage battery circuit, damaged wiring, a defective battery module, or issues with the battery control module.

4. Can you drive with the P1BAA code on a Saturn?

While the vehicle may still be drivable, itâ€™s not recommended as it could lead to further damage to the hybrid/electric battery system or reduced performance.

5. How is the P1BAA code diagnosed on a Saturn?

A technician will use a diagnostic scanner to read the code, inspect the high-voltage battery system, check for damaged wiring, and perform voltage tests on the battery modules.

6. What repairs are needed to fix the P1BAA code on a Saturn?

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

7. How much does it cost to fix the P1BAA code?

The cost can vary widely depending on the exact issue. Minor repairs like fixing wiring may cost a few hundred dollars, while replacing a battery module can be significantly more expensive.

8. Can a low 12V battery cause the P1BAA code on a Saturn?

While unlikely, a weak 12V battery can sometimes contribute to communication or voltage issues in hybrid systems, so itâ€™s worth checking.

9. Does the P1BAA code require reprogramming the battery control module?

In some cases, reprogramming the battery control module may be necessary to resolve the issue if itâ€™s related to software glitches or improper calibration.

10. How can I prevent the P1BAA code from recurring on my Saturn?

Regular maintenance of the hybrid system, ensuring proper battery cooling, and addressing any warning signs early can help prevent this code from recurring.