AutoCodes – Generic – P1FE1

P1FE1 Code - Hybrid/EV Battery Interface Control Module 3 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: P1FE1 indicates Hybrid/EV Battery Interface Control Module 3 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 1,272

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 P1FE1 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 P1FE1 - Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit High Voltage - AutoCodes.com — P1FE1 Code - Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1FE1?

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 P1FE1?

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 P1FE1 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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Information for Specific Makes

P1FE1 Buick — Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit High Voltage
P1FE1 Cadillac — Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit High Voltage
P1FE1 Chevrolet — Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit High Voltage
P1FE1 GMC — Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit High Voltage
P1FE1 Saturn — Hybrid/EV Battery Interface Control Module 3 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 P1FE1 Code

1. What does OBDII code P1FE1 mean?

Code P1FE1 indicates that the Hybrid/EV Battery Interface Control Module 3 has detected an abnormally high voltage in the voltage sensor circuit.

2. What are the common symptoms of code P1FE1?

Common symptoms include the hybrid/EV system warning light or check engine light illuminating, limited EV mode functionality, and reduced fuel efficiency or driving range.

3. What causes the P1FE1 code to be triggered?

The code is typically caused by a faulty voltage sensor, damaged wiring or connectors in the sensor circuit, a malfunctioning Battery Interface Control Module, or issues with the hybrid/EV battery pack.

4. Can I drive my vehicle with the P1FE1 code?

Driving with this code is not recommended, as it may lead to further damage to the hybrid/EV system or reduced performance. Have the issue diagnosed and repaired promptly.

5. How is the P1FE1 code diagnosed?

A technician will use a scan tool to read the code, inspect the voltage sensor circuit and wiring for damage, and test the functionality of the Battery Interface Control Module and hybrid/EV battery.

6. What repairs can fix the P1FE1 code?

Repairs may include replacing the faulty voltage sensor, repairing or replacing damaged wiring or connectors, updating the control module's software, or addressing issues with the hybrid/EV battery.

7. How much does it cost to fix the P1FE1 code?

Repair costs can vary widely, ranging from $100 for wiring repairs to $1,000 or more if the Battery Interface Control Module or hybrid/EV battery needs replacement.

8. Can low battery charge cause the P1FE1 code?

A low battery charge is unlikely to directly cause this code, but underlying issues with the hybrid/EV battery pack can contribute to triggering the fault.

9. Is P1FE1 a manufacturer-specific code?

Yes, P1FE1 is often a manufacturer-specific code, and its exact definition and repair procedures may vary depending on the vehicle make and model.

10. How can I prevent the P1FE1 code from recurring?

Regular maintenance of the hybrid/EV battery system, timely inspections of wiring and connectors, and addressing minor issues early can help prevent this code from recurring.