AutoCodes – Saturn – P1FEF Saturn

P1FEF Saturn Code - Hybrid/EV Battery Interface Control Module 7 Voltage Sensor Performance

Quick Answer

The hybrid battery contains 192 individual cells. Common causes include Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted, Hybrid/EV Battery Interface Control Module circuit poor electrical connection. 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: P1FEF Saturn indicates Hybrid/EV Battery Interface Control Module 7 Voltage Sensor Performance.
Common causes: Common causes include Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted, Hybrid/EV Battery Interface Control Module circuit poor electrical connection.
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 819

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 Apr 27, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1FEF Saturn Description

The hybrid battery contains 192 individual cells. Two cells are welded together in parallel and called a cell group. There are a total of 96 cell groups in the hybrid battery 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 cell groups are joined to form 3 distinct sections. The first 24 battery cell groups make up battery section 1. This section is adjacent to the cowl and contains battery cell groups 73 through 96. The next 28 battery cell groups make up battery section 2. This section is located behind section 1 and contains battery cell groups 45 through 72. The transverse battery section is section number 3 and it contains the remaining 44 battery cell groups 1 through 44. The battery sections also contain two temperature sensors, with one sensor located at each end of the section.
The battery energy control module monitors the voltage of the 96 battery cell groups. The voltage sense lines are attached to each individual cell group, and these sense lines terminate at a connector located on the top surface of the battery section. A voltage sense harness joins this connector to the battery energy control module.
The battery energy control module contains internal interface control modules that monitor specific cell groups.
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 the hybrid powertrain control module 2 through serial data. The hybrid powertrain control module 2 is the host controller for diagnostic trouble code information.

OBDII Code P1FEF Saturn - Hybrid/EV Battery Interface Control Module 7 Voltage Sensor Performance - AutoCodes.com — P1FEF Saturn Code - Hybrid/EV Battery Interface Control Module 7 Voltage Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P1FEF Saturn?

Faulty Hybrid/EV Battery Interface Control Module
Hybrid/EV Battery Interface Control Module harness is open or shorted
Hybrid/EV Battery Interface Control Module circuit poor electrical connection

How to Fix the DTC P1FEF 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 P1FEF 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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Need Help with the Code?

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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 P1FEF Saturn Code

1. What are the common symptoms of OBDII code P1FEF in a Saturn Hybrid/EV vehicle?

- Common symptoms include poor fuel economy, reduced engine performance, warning lights on the dashboard, and potential stalling of the vehicle.

2. What are the possible causes of OBDII code P1FEF in a Saturn Hybrid/EV vehicle?

- The code may be triggered by issues with the Hybrid/EV Battery Interface Control Module 7 Voltage Sensor, such as sensor malfunctions, wiring problems, or module failures.

3. How can I diagnose the Hybrid/EV Battery Interface Control Module 7 Voltage Sensor to repair OBDII code P1FEF in my Saturn?

- Diagnosis typically involves using a scan tool to read the code, checking the sensor's wiring and connections for any faults, and testing the sensor's voltage output.

4. Can I continue driving my Saturn with OBDII code P1FEF present?

- It is not recommended to drive the vehicle with this code active, as it can lead to further damage to the hybrid/EV system and potentially cause safety hazards.

5. How can I reset OBDII code P1FEF in my Saturn Hybrid/EV vehicle?

- Resetting the code usually involves using an OBDII scanner to clear the code from the vehicle's system after addressing the underlying issue with the Hybrid/EV Battery Interface Control Module 7 Voltage Sensor.

6. Do I need to replace the Hybrid/EV Battery Interface Control Module 7 Voltage Sensor to fix OBDII code P1FEF?

- Depending on the specific issue causing the code, you may need to replace the sensor if it is determined to be faulty or damaged beyond repair.

7. Are there any specific maintenance tips to prevent OBDII code P1FEF in my Saturn Hybrid/EV vehicle?

- Regularly checking and maintaining the hybrid/EV system components, including the voltage sensor, can help prevent issues that may trigger the P1FEF code.

8. Can a DIY enthusiast fix OBDII code P1FEF in a Saturn Hybrid/EV vehicle?

- While some diagnosis and basic checks can be done by a DIY enthusiast, repairing the specific issue with the Hybrid/EV Battery Interface Control Module 7 Voltage Sensor may require professional help due to the complexity of the system.

9. How long does it typically take to repair OBDII code P1FEF in a Saturn Hybrid/EV vehicle?

- The repair time can vary depending on the exact cause of the code, but it may take a few hours to a day for diagnosis, part replacement, and testing.

10. Is OBDII code P1FEF a common issue in Saturn Hybrid/EV vehicles?

- While not extremely common, issues related to the Hybrid/EV Battery Interface Control Module 7 Voltage Sensor can trigger the P1FEF code in Saturn Hybrid/EV vehicles, especially as they age.