AutoCodes – Cadillac – P1FEC Cadillac

P1FEC Cadillac Code - Hybrid/EV Battery Interface Control Module 4 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: P1FEC Cadillac indicates Hybrid/EV Battery Interface Control Module 4 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 939

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 P1FEC 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 P1FEC Cadillac - Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance - AutoCodes.com — P1FEC Cadillac Code - Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P1FEC 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 P1FEC 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 P1FEC 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 P1FEC Cadillac Code

1. What are common symptoms of OBDII code P1FEC in a Cadillac related to the Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance?

The common symptoms include poor fuel efficiency, reduced power, warning lights such as the Check Engine Light, and potentially the vehicle going into "limp mode."

2. What are the possible causes of OBDII code P1FEC in a Cadillac?

The potential causes of this code can be a faulty Hybrid/EV Battery Interface Control Module 4, issues with the voltage sensor, wiring problems, or software glitches within the vehicle's system.

3. How can I diagnose the OBDII code P1FEC in my Cadillac?

Diagnosing this code typically involves using a professional OBDII scanner to read the specific fault codes, checking the voltage sensor readings, inspecting the wiring for any damage, and testing the Hybrid/EV Battery Interface Control Module 4 for proper functionality.

4. Can I drive my Cadillac with the OBDII code P1FEC present?

It is not recommended to drive the vehicle with this code present, as it can lead to further issues with the hybrid or electric system. It is best to address the problem promptly to prevent potential damage.

5. How can I repair OBDII code P1FEC in my Cadillac?

Repairing this code may involve replacing the Hybrid/EV Battery Interface Control Module 4, repairing any damaged wiring, recalibrating the voltage sensor, or updating the vehicle's software to address any glitches.

6. Are there any DIY tips for fixing OBDII code P1FEC in a Cadillac?

While some basic checks like inspecting the wiring connections can be done by DIY enthusiasts, it is recommended to seek professional help for diagnosing and repairing issues related to the Hybrid/EV system to ensure accurate and safe repairs.

7. How urgent is it to address the OBDII code P1FEC in a Cadillac?

It is important to address this code promptly to prevent potential damage to the hybrid or electric system of the vehicle. Ignoring the issue can lead to more severe problems over time.

8. Can a low battery voltage trigger the OBDII code P1FEC in a Cadillac?

Yes, a low battery voltage can potentially trigger this code as it may affect the performance of the Hybrid/EV Battery Interface Control Module 4 and its voltage sensor.

9. Is resetting the trouble codes a sufficient solution for OBDII code P1FEC in a Cadillac?

Simply resetting the trouble codes may temporarily clear the Check Engine Light, but it will not fix the underlying issue causing the OBDII code P1FEC. It is important to diagnose and address the root cause of the problem.

10. How much does it cost to fix OBDII code P1FEC in a Cadillac?

The cost of fixing this code can vary depending on the specific cause of the issue, parts needed for repair, and labor costs. It is recommended to consult with a mechanic or dealership for an accurate estimate.