AutoCodes – Cadillac – P1FEE Cadillac

P1FEE Cadillac 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 Cadillac 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 736

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

What does this mean?

What are the Possible Causes of the DTC P1FEE Cadillac?

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 Cadillac?

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 Cadillac 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 P1FEE Cadillac Code

What are common symptoms of OBDII code P1FEE on a Cadillac Hybrid/EV?

Common symptoms may include poor fuel economy, reduced hybrid system performance, illuminated warning lights on the dashboard, and potentially the vehicle going into a reduced power mode.

What are possible causes of OBDII code P1FEE on a Cadillac Hybrid/EV?

Possible causes can be a faulty hybrid/EV battery interface control module, issues with the voltage sensor, damaged wiring or connections, or a failing hybrid battery.

How can I diagnose the issue related to OBDII code P1FEE on my Cadillac Hybrid/EV?

Diagnosis typically involves using a professional OBDII scanner to read the code, inspecting the hybrid/EV battery interface control module, checking the voltage sensor, and performing a thorough inspection of the hybrid battery system.

Is it safe to continue driving my Cadillac Hybrid/EV with OBDII code P1FEE present?

It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the hybrid system. It's best to have the issue diagnosed and repaired as soon as possible.

What are some repair tips for fixing OBDII code P1FEE on a Cadillac Hybrid/EV?

Repair tips may include checking and repairing any damaged wiring or connections, replacing the faulty hybrid/EV battery interface control module, testing and potentially replacing the voltage sensor, and ensuring the hybrid battery is functioning properly.

Can OBDII code P1FEE on a Cadillac Hybrid/EV be fixed without professional help?

While some basic troubleshooting steps can be taken by the owner, diagnosing and repairing issues related to this code often require specialized knowledge and tools. It is advisable to seek professional help for an accurate diagnosis and proper repair.

How much does it typically cost to repair OBDII code P1FEE on a Cadillac Hybrid/EV?

The cost of repair can vary depending on the exact cause of the issue. It may range from a few hundred to a few thousand dollars, considering parts and labor costs.

Are there any preventive measures to avoid OBDII code P1FEE on a Cadillac Hybrid/EV?

Regular maintenance of the hybrid/EV system, including checking the battery, connections, and control modules, can help prevent issues that may trigger this code. Following the manufacturer's recommended service schedule is key to preventing such problems.