AutoCodes – Chevrolet – P1FEF Chevrolet

P1FEF Chevrolet Code - Hybrid/EV Battery Interface Control Module 7 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: P1FEF Chevrolet indicates Hybrid/EV Battery Interface Control Module 7 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 875

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 P1FEF Chevrolet 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 P1FEF Chevrolet - Hybrid/EV Battery Interface Control Module 7 Voltage Sensor Performance - AutoCodes.com — P1FEF Chevrolet Code - Hybrid/EV Battery Interface Control Module 7 Voltage Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P1FEF Chevrolet?

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 P1FEF Chevrolet?

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 P1FEF Chevrolet 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 P1FEF Chevrolet Code

1. What are the common symptoms of OBDII code P1FEF in a Chevrolet vehicle?

- Common symptoms include check engine light illuminating, reduced hybrid/EV system performance, and potential issues with battery charging.

2. What causes the OBDII code P1FEF related to Hybrid/EV Battery Interface Control Module 7 Voltage Sensor Performance in a Chevrolet?

- The code is typically triggered by a fault in the Hybrid/EV Battery Interface Control Module 7 voltage sensor, which may be due to wiring issues, sensor damage, or module failure.

3. How can I diagnose the OBDII code P1FEF in my Chevrolet related to the Hybrid/EV Battery Interface Control Module 7 Voltage Sensor Performance?

- Diagnosis involves using an OBDII scanner to read the code and then performing a thorough inspection of the voltage sensor, wiring, and related components to identify the root cause.

4. Can I continue driving my Chevrolet with the OBDII code P1FEF present?

- It is not recommended to continue driving the vehicle with this code active, as it can lead to further damage to the hybrid/EV system and potentially affect overall vehicle performance.

5. What are some repair tips for addressing the OBDII code P1FEF in a Chevrolet?

- Repair tips include checking and repairing any damaged wiring, replacing the faulty voltage sensor, or, if necessary, replacing the Hybrid/EV Battery Interface Control Module 7.

6. Is it possible to reset the OBDII code P1FEF in a Chevrolet without fixing the underlying issue?

- While clearing the code with an OBDII scanner may temporarily turn off the check engine light, the code is likely to reappear if the root cause of the issue is not addressed.

7. How much does it typically cost to repair the OBDII code P1FEF in a Chevrolet related to the Hybrid/EV Battery Interface Control Module 7 Voltage Sensor Performance?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing the voltage sensor, repairing wiring, or replacing the control module, which can range from a few hundred to over a thousand dollars.

8. Are there any recalls or technical service bulletins related to the OBDII code P1FEF in Chevrolet vehicles?

- It is recommended to check with authorized Chevrolet dealerships or the manufacturer's website for any recalls or technical service bulletins related to this specific OBDII code to see if there are known issues or remedies available.

9. Can a DIY enthusiast with automotive knowledge address the OBDII code P1FEF in a Chevrolet themselves?

- While some experienced DIY enthusiasts may be able to diagnose and repair the issue related to the Hybrid/EV Battery Interface Control Module 7 Voltage Sensor Performance, it is recommended to consult a professional technician for accurate diagnosis and proper repair.

10. How long does it typically take to repair the OBDII code P1FEF in a Chevrolet at a certified repair shop?

- The repair time can vary based on the exact cause of the issue and the availability of parts, but it may take a few hours to a full day for a certified technician to diagnose and fix the problem related to the Hybrid/EV Battery Interface Control Module 7 Voltage Sensor Performance.