AutoCodes – Cadillac – P1FE5 Cadillac

P1FE5 Cadillac Code - Hybrid/EV Battery Interface Control Module 7 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: P1FE5 Cadillac indicates Hybrid/EV Battery Interface Control Module 7 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 691

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 P1FE5 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 P1FE5 Cadillac - Hybrid/EV Battery Interface Control Module 7 Voltage Sensor Circuit High Voltage - AutoCodes.com — P1FE5 Cadillac Code - Hybrid/EV Battery Interface Control Module 7 Voltage Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1FE5 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 P1FE5 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 P1FE5 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 P1FE5 Cadillac Code

1. What are common symptoms of OBDII code P1FE5 in a Cadillac Hybrid/EV?

- Common symptoms include the check engine light coming on, reduced fuel efficiency, poor engine performance, and potential issues with the hybrid or electric systems.

2. What does the OBDII code P1FE5 indicate in a Cadillac Hybrid/EV?

- The code P1FE5 indicates a high voltage sensor circuit issue with Hybrid/EV Battery Interface Control Module 7 in the vehicle.

3. What are possible causes of the P1FE5 code in a Cadillac Hybrid/EV?

- Possible causes include a faulty voltage sensor, wiring issues, a malfunctioning battery control module, or problems with the high voltage system in the vehicle.

4. How can I diagnose the P1FE5 code in my Cadillac Hybrid/EV?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, checking the voltage sensor circuit, inspecting wiring connections, and testing the hybrid/EV battery control module.

5. Is it safe to continue driving with the P1FE5 code in my Cadillac Hybrid/EV?

- It is not recommended to drive the vehicle with the P1FE5 code present, as it can lead to further electrical system issues and potential safety hazards.

6. Can I repair the P1FE5 code in my Cadillac Hybrid/EV myself?

- While some simple wiring or connection issues may be fixed by an experienced DIYer, it is recommended to have a professional technician diagnose and repair the underlying cause of the P1FE5 code.

7. How much does it typically cost to repair the P1FE5 code in a Cadillac Hybrid/EV?

- The cost of repairing the P1FE5 code can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Will resetting the OBDII code P1FE5 make it go away permanently?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue is not addressed, the code is likely to reappear once the system detects the problem again.

9. Can the P1FE5 code be triggered by a weak or failing hybrid/EV battery in a Cadillac?

- Yes, a weak or failing hybrid/EV battery can potentially trigger the P1FE5 code due to issues with voltage readings and sensor circuitry.

10. How often should I have the hybrid/EV system in my Cadillac checked to prevent the P1FE5 code from occurring?

- It is recommended to have the hybrid/EV system inspected during regular maintenance visits or if you notice any unusual symptoms to prevent the occurrence of codes like P1FE5.