AutoCodes – Cadillac – P1FE7 Cadillac

P1FE7 Cadillac Code - Hybrid/EV Battery Interface Control Module 9 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: P1FE7 Cadillac indicates Hybrid/EV Battery Interface Control Module 9 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 859

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 P1FE7 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 P1FE7 Cadillac - Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit High Voltage - AutoCodes.com — P1FE7 Cadillac Code - Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1FE7 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 P1FE7 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 P1FE7 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 P1FE7 Cadillac Code

1. What are the common symptoms of OBDII code P1FE7 in a Cadillac Hybrid/EV?

- Common symptoms include the check engine light turning on, decreased fuel efficiency, lack of power, and potential issues with the hybrid or electric drive system.

2. What can cause the Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit to register high voltage?

- The high voltage sensor circuit in the control module can register high voltage due to a fault in the sensor itself, wiring issues, or problems within the hybrid or electric battery system.

3. How serious is the P1FE7 OBDII code in a Cadillac Hybrid/EV?

- This code can be a serious issue as it pertains to the high voltage system in a hybrid or electric vehicle. It is important to address this code promptly to avoid potential damage to the battery system.

4. Can driving with the P1FE7 code present cause further damage to the vehicle?

- Continuing to drive with the P1FE7 code present can potentially cause further damage to the hybrid or electric battery system, leading to more costly repairs in the future.

5. How can I diagnose the cause of the P1FE7 code in my Cadillac Hybrid/EV?

- To diagnose the cause of the P1FE7 code, it is recommended to use a professional OBDII scanner to read the specific fault codes and perform a thorough inspection of the high voltage sensor circuit and related components.

6. Is it safe to continue driving my Cadillac Hybrid/EV with the P1FE7 code present?

- It is not recommended to drive the vehicle with the P1FE7 code present, as it indicates a potential issue with the high voltage system that could compromise the safety and performance of the vehicle.

7. What are some repair tips for addressing the P1FE7 OBDII code in a Cadillac Hybrid/EV?

- Repair tips may include checking and replacing the high voltage sensor, inspecting and repairing any damaged wiring, and ensuring proper connection and function of the hybrid or electric battery system.

8. Can I reset the P1FE7 code in my Cadillac Hybrid/EV without addressing the underlying issue?

- While you can clear the code using an OBDII scanner, it is essential to address the underlying issue causing the P1FE7 code to prevent further problems with the high voltage system.

9. How much does it typically cost to repair the Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit high voltage issue?

- The cost of repairing the high voltage sensor circuit issue can vary depending on the exact cause of the problem, but it may involve sensor replacement, wiring repairs, or other system diagnostics that can range from a few hundred to over a thousand dollars.

10. Are there any recalls or technical service bulletins related to the P1FE7 code in Cadillac Hybrid/EV models?

- It is recommended to check with a Cadillac dealership or online resources for any recalls or technical service bulletins related to the P1FE7 code to see if there are known issues or remedies provided by the manufacturer.