AutoCodes – Generic – P1FE7

P1FE7 Code - Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit High Voltage

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: P1FE7 indicates Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit High Voltage.
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 901

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 P1FE7 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 P1FE7 - Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit High Voltage - AutoCodes.com — P1FE7 Code - Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1FE7?

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 P1FE7?

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 P1FE7 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.

Need more information about the P1FE7 code?

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Information for Specific Makes

P1FE7 Buick — Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit High Voltage
P1FE7 Cadillac — Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit High Voltage
P1FE7 Chevrolet — Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit High Voltage
P1FE7 GMC — Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit High Voltage
P1FE7 Saturn — Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit High Voltage

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 P1FE7 Code

1. What are the common symptoms of OBDII code P1FE7 related to the Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit High Voltage?

- Common symptoms include illuminated check engine light, decreased fuel efficiency, and potential drivability issues in hybrid or electric vehicles.

2. What are the possible causes of OBDII code P1FE7 indicating a high voltage sensor circuit issue in the Hybrid/EV Battery Interface Control Module 9?

- Possible causes may include a faulty voltage sensor, damaged wiring or connectors, issues with the hybrid/EV battery interface control module, or high voltage system malfunctions.

3. How can I diagnose the OBDII code P1FE7 in my hybrid or electric vehicle?

- Diagnosis typically involves using a scan tool to retrieve the fault code, inspecting the high voltage sensor circuit for damage, testing the voltage sensor, and checking the hybrid/EV battery interface control module.

4. Is it safe to continue driving with OBDII code P1FE7 present in my vehicle?

- It is recommended to address the issue promptly to prevent potential damage to the high voltage system and ensure the safe operation of your hybrid or electric vehicle.

5. Can I repair OBDII code P1FE7 related to the Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit High Voltage myself?

- Repairing this code may require specialized knowledge and tools due to the high voltage nature of the system. It is advisable to seek assistance from a qualified technician or dealership.

6. Are there any specific maintenance tips to prevent OBDII code P1FE7 from recurring in the future?

- Regularly inspecting the high voltage system, keeping connections clean and secure, and following manufacturer-recommended maintenance schedules can help prevent issues leading to this fault code.

7. How much does it typically cost to repair OBDII code P1FE7 in a hybrid or electric vehicle?

- Repair costs can vary depending on the specific underlying issue causing the fault code. It is recommended to obtain diagnostics from a professional to determine the exact repair cost.

8. Can OBDII code P1FE7 be triggered by a low battery in a hybrid or electric vehicle?

- While a low or failing battery can cause various issues in a vehicle, OBDII code P1FE7 specifically relates to a high voltage sensor circuit problem rather than a low battery issue.

9. Are there any recalls or technical service bulletins related to OBDII code P1FE7 in certain hybrid or electric vehicle models?

- It is advisable to check with the vehicle manufacturer or authorized dealerships for any recalls or technical service bulletins regarding this specific fault code in your vehicle model.

10. How urgent is it to address OBDII code P1FE7 in a hybrid or electric vehicle?

- Addressing this fault code promptly is crucial to prevent potential safety hazards and further damage to the high voltage system. It is recommended to schedule a diagnostic and repair as soon as possible.