AutoCodes – Chevrolet – P1FE9 Chevrolet

P1FE9 Chevrolet Code - Hybrid/EV Battery Interface Control Module 1 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: P1FE9 Chevrolet indicates Hybrid/EV Battery Interface Control Module 1 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 741

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 P1FE9 Chevrolet 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 P1FE9 Chevrolet - Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Performance - AutoCodes.com — P1FE9 Chevrolet Code - Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P1FE9 Chevrolet?

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 P1FE9 Chevrolet?

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 P1FE9 Chevrolet 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 P1FE9 Chevrolet Code

1. What are the common symptoms of OBDII code P1FE9 in a Chevrolet hybrid/EV vehicle?

- Common symptoms include poor fuel efficiency, reduced power output, illuminated check engine light, and potential hybrid system malfunctions.

2. What are the possible causes of OBDII code P1FE9 indicating Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Performance issue in a Chevrolet?

- Possible causes may include a faulty Hybrid/EV Battery Interface Control Module, damaged wiring or connectors, low battery voltage, or issues with the voltage sensor itself.

3. How can I diagnose the OBDII code P1FE9 in my Chevrolet hybrid/EV vehicle?

- Diagnosing the code involves using a professional OBDII scanner to read the specific trouble code, inspecting the hybrid/EV battery system components, and testing the voltage sensor for proper function.

4. What should I do if I encounter OBDII code P1FE9 in my Chevrolet with regards to repair?

- It is recommended to consult a qualified technician or dealership for a thorough diagnosis and repair. They can accurately pinpoint the issue and perform any necessary repairs or component replacements.

5. Can I continue driving my Chevrolet with the OBDII code P1FE9 present?

- It is not recommended to continue driving the vehicle with this code active, as it can lead to further damage to the hybrid/EV system and potentially affect the vehicle's performance and safety.

6. Are there any DIY repair tips for addressing OBDII code P1FE9 in a Chevrolet hybrid/EV vehicle?

- DIY repairs for this code are not recommended due to the complexity of the hybrid/EV system. It is best to leave diagnosis and repair to trained professionals with experience in hybrid vehicle systems.

7. How much does it typically cost to repair OBDII code P1FE9 in a Chevrolet hybrid/EV vehicle?

- The cost of repairs for this code can vary depending on the specific cause of the issue and the labor rates of the servicing facility. It is best to obtain a diagnosis and repair estimate from a qualified technician.

8. Can a low battery voltage trigger OBDII code P1FE9 in a Chevrolet hybrid/EV vehicle?

- Yes, a low battery voltage can be a potential cause of the P1FE9 trouble code, as the voltage sensor may not be receiving the proper voltage signals for accurate performance monitoring.

9. Is the Hybrid/EV Battery Interface Control Module 1 Voltage Sensor a common failure point in Chevrolet hybrid vehicles?

- While failures of the voltage sensor are not extremely common, they can occur over time due to wear and tear or electrical issues within the hybrid/EV system.

10. What steps can I take to prevent OBDII code P1FE9 from appearing in my Chevrolet hybrid/EV vehicle?

- Regular maintenance, including checking the hybrid/EV system components, ensuring proper battery voltage, and addressing any warning lights promptly, can help prevent the occurrence of this trouble code.