AutoCodes – Generic – P1FD5

P1FD5 Code - Hybrid/EV Battery Interface Control Module 1 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: P1FD5 indicates Hybrid/EV Battery Interface Control Module 1 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 822

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 P1FD5 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 P1FD5 - Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit Low Voltage - AutoCodes.com — P1FD5 Code - Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1FD5?

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 P1FD5?

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 P1FD5 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 P1FD5 code?

Need more information on how to fix the P1FD5 code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Makes

P1FD5 Buick — Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit Low Voltage
P1FD5 Cadillac — Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit Low Voltage
P1FD5 Chevrolet — Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit Low Voltage
P1FD5 GMC — Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit Low Voltage
P1FD5 Saturn — Hybrid/EV Battery Interface Control Module 1 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 P1FD5 Code

1. What does the OBDII code P1FD5 mean?

P1FD5 indicates a problem with the Hybrid/EV Battery Interface Control Module 1, specifically the voltage sensor circuit reporting a low voltage condition.

2. What are the common symptoms of the P1FD5 code?

Symptoms may include an illuminated check engine light, reduced hybrid/electric vehicle performance, decreased fuel efficiency, or limited EV mode functionality.

3. What causes the P1FD5 code to appear?

Common causes include a faulty voltage sensor, damaged wiring or connectors in the voltage sensor circuit, a malfunctioning control module, or a failing hybrid/EV battery.

4. Can I drive my car with the P1FD5 code?

While the vehicle may still be drivable, it is not recommended to ignore this code, as it can lead to further damage to the hybrid/EV battery system or reduced performance over time.

5. How is the P1FD5 code diagnosed?

A technician will use a scan tool to verify the code, inspect the voltage sensor circuit for damage, and test the functionality of the control module and associated components.

6. What repairs are typically needed for the P1FD5 code?

Repairs may include replacing the voltage sensor, repairing or replacing damaged wiring or connectors, reprogramming or replacing the control module, or addressing hybrid/EV battery issues.

7. How much does it cost to fix the P1FD5 code?

Repair costs can vary widely, ranging from $100 to $1,500 or more, depending on the specific component requiring repair or replacement.

8. Can a dead 12V accessory battery cause the P1FD5 code?

While rare, issues with the 12V accessory battery can sometimes impact hybrid/EV systems, so itâ€™s worth inspecting the 12V system as part of the diagnostic process.

9. Will clearing the P1FD5 code fix the problem?

Clearing the code without addressing the underlying issue will not fix the problem and the code is likely to return.

10. Is the P1FD5 code specific to certain vehicle makes or models?

This code is most commonly found in hybrid or electric vehicles, but its exact definition and diagnostic steps may vary slightly between manufacturers. Always consult the repair manual for your specific vehicle.