AutoCodes – Generic – P1FDE

P1FDE Code - Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Circuit Low 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: P1FDE indicates Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Circuit Low 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 806

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 P1FDE 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 P1FDE - Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Circuit Low Voltage - AutoCodes.com — P1FDE Code - Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1FDE?

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 P1FDE?

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 P1FDE 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.

Need more information about the P1FDE code?

Need more information on how to fix the P1FDE code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Makes

P1FDE Buick — Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Circuit Low Voltage
P1FDE Cadillac — Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Circuit Low Voltage
P1FDE Chevrolet — Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Circuit Low Voltage
P1FDE GMC — Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Circuit Low Voltage
P1FDE Saturn — Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Circuit Low Voltage

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 P1FDE Code

What does the OBDII code P1FDE mean?

The OBDII code P1FDE indicates a low voltage condition in the voltage sensor circuit of the Hybrid/EV Battery Interface Control Module.

What are the common symptoms of the P1FDE code?

Common symptoms include warning lights on the dashboard, reduced hybrid or electric vehicle performance, and possible difficulties in starting the vehicle.

What could cause the P1FDE code to trigger?

Causes may include a faulty voltage sensor, poor electrical connections, damaged wiring, or issues with the hybrid battery itself.

How can I diagnose the P1FDE code?

Start by using an OBDII scanner to confirm the code, then inspect the voltage sensor, wiring, and connectors for damage or corrosion. Testing the battery voltage may also be necessary.

What steps can be taken to repair the P1FDE code?

Repairs may involve replacing the faulty voltage sensor, cleaning or repairing electrical connections, or addressing any issues with the hybrid battery system.

Is it safe to drive with the P1FDE code?

While it may be possible to drive short distances, it is not advisable as it could lead to reduced performance and potential further damage to the hybrid system.

Can I clear the P1FDE code without fixing the issue?

Yes, you can clear the code using an OBDII scanner, but if the underlying issue is not resolved, the code will likely reappear.

Will the P1FDE code affect my vehicle's fuel efficiency?

Yes, this code may lead to decreased fuel efficiency due to poor performance of the hybrid or electric system.

How much does it typically cost to fix the P1FDE code?

Repair costs can vary widely depending on the root cause but may range from a few hundred dollars for minor repairs to over a thousand for battery replacement or major component issues.