AutoCodes – Generic – P1FEE

P1FEE Code - Hybrid/EV Battery Interface Control Module 6 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: P1FEE indicates Hybrid/EV Battery Interface Control Module 6 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 906

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 P1FEE 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 P1FEE - Hybrid/EV Battery Interface Control Module 6 Voltage Sensor Performance - AutoCodes.com — P1FEE Code - Hybrid/EV Battery Interface Control Module 6 Voltage Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P1FEE?

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 P1FEE?

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 P1FEE 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

P1FEE Buick — Hybrid/EV Battery Interface Control Module 6 Voltage Sensor Performance
P1FEE Cadillac — Hybrid/EV Battery Interface Control Module 6 Voltage Sensor Performance
P1FEE Chevrolet — Hybrid/EV Battery Interface Control Module 6 Voltage Sensor Performance
P1FEE GMC — Hybrid/EV Battery Interface Control Module 6 Voltage Sensor Performance
P1FEE Saturn — Hybrid/EV Battery Interface Control Module 6 Voltage Sensor Performance

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 P1FEE Code

1. What does OBDII code P1FEE mean?

P1FEE indicates a performance issue with the voltage sensor in the Hybrid/EV Battery Interface Control Module 6, which monitors battery voltage levels.

2. What are the symptoms of code P1FEE?

Common symptoms include a hybrid system warning light, reduced fuel efficiency, limited EV mode functionality, or the vehicle failing to switch between power modes.

3. What causes code P1FEE?

This code is typically caused by a faulty voltage sensor, damaged wiring or connectors, software issues in the control module, or a malfunctioning battery management system.

4. Can I drive my car with code P1FEE?

Driving with this code is not recommended, as it may lead to reduced performance, potential battery system damage, or unsafe operating conditions.

5. How is code P1FEE diagnosed?

A mechanic will inspect the voltage sensor, wiring, and connectors for damage, perform voltage tests, and check for software updates or additional related trouble codes.

6. How do you fix code P1FEE?

Repairs may include replacing the faulty voltage sensor, repairing or replacing damaged wiring, updating software, or replacing the Hybrid/EV Battery Interface Control Module.

7. Is code P1FEE specific to certain vehicles?

Yes, this code is specific to hybrid and electric vehicles with advanced battery management systems, often from manufacturers like GM, Ford, or others with similar setups.

8. How much does it cost to fix code P1FEE?

The repair cost varies depending on the issue, ranging from $150 for minor wiring fixes to over $1,000 if the control module or sensor needs replacement.

9. Can a dead 12V battery cause code P1FEE?

A weak or failing 12V auxiliary battery can sometimes trigger voltage-related codes, but further diagnosis is needed to confirm.

10. How can I prevent code P1FEE from occurring?

Regular maintenance of the hybrid battery system, inspecting wiring and connectors for damage, and updating software as recommended by the manufacturer can help prevent this code.