AutoCodes – Generic – P1FD6

P1FD6 Code - Hybrid/EV Battery Interface Control Module 2 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: P1FD6 indicates Hybrid/EV Battery Interface Control Module 2 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 1,381

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 P1FD6 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 P1FD6 - Hybrid/EV Battery Interface Control Module 2 Voltage Sensor Circuit Low Voltage - AutoCodes.com — P1FD6 Code - Hybrid/EV Battery Interface Control Module 2 Voltage Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1FD6?

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 P1FD6?

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 P1FD6 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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Information for Specific Makes

P1FD6 Buick — Hybrid/EV Battery Interface Control Module 2 Voltage Sensor Circuit Low Voltage
P1FD6 Cadillac — Hybrid/EV Battery Interface Control Module 2 Voltage Sensor Circuit Low Voltage
P1FD6 Chevrolet — Hybrid/EV Battery Interface Control Module 2 Voltage Sensor Circuit Low Voltage
P1FD6 GMC — Hybrid/EV Battery Interface Control Module 2 Voltage Sensor Circuit Low Voltage
P1FD6 Saturn — Hybrid/EV Battery Interface Control Module 2 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 P1FD6 Code

What does the OBDII code P1FD6 mean?

Code P1FD6 indicates a low voltage issue in the Hybrid/EV Battery Interface Control Module 2 Voltage Sensor Circuit, which monitors the voltage of the hybrid or EV battery system.

What are the common symptoms of code P1FD6?

Symptoms may include warning lights on the dashboard, reduced fuel efficiency, limited hybrid/EV functionality, or decreased overall vehicle performance.

What causes the P1FD6 code to appear?

Common causes include a faulty voltage sensor, wiring issues such as corrosion or damage, a malfunctioning battery interface control module, or a hybrid/EV battery problem.

Can driving with code P1FD6 damage the vehicle?

Driving with this code may lead to further damage to the hybrid/EV battery system and reduced performance. It is recommended to address the issue promptly.

How is code P1FD6 diagnosed?

A mechanic will use a scan tool to verify the code, inspect the voltage sensor circuit, check the wiring for damage, and test the battery interface control module for proper operation.

What repairs are typically needed for code P1FD6?

Repairs may include replacing the voltage sensor, repairing or replacing damaged wiring, or replacing the battery interface control module.

Can a weak hybrid/EV battery trigger code P1FD6?

Yes, a weak or failing hybrid/EV battery can cause voltage fluctuations, which may trigger this code.

Is code P1FD6 specific to certain vehicle makes or models?

While it is most commonly associated with hybrid and electric vehicles, it may be more prevalent in certain manufacturers depending on their system design.

How much does it cost to fix code P1FD6?

Repair costs vary depending on the exact cause, but sensor replacement typically costs between $100-$300, while module replacement or battery-related repairs may be more expensive.

Can code P1FD6 be resolved by resetting the ECU?

Resetting the ECU may clear the code temporarily, but the underlying issue will need to be resolved to prevent the code from returning.