AutoCodes – Buick – P1FD5 Buick

P1FD5 Buick 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 Buick 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 718

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

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 Buick?

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 Buick 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 P1FD5 Buick Code

1. What are the common symptoms of OBDII code P1FD5 in a Buick Hybrid/EV vehicle?

- Common symptoms of this code may include reduced hybrid/EV system performance, lower fuel efficiency, warning lights on the dashboard, and possible difficulty starting the vehicle.

2. What are the possible causes of OBDII code P1FD5 in a Buick Hybrid/EV vehicle?

- The code P1FD5 in a Buick Hybrid/EV vehicle can be caused by issues such as a faulty hybrid/EV battery interface control module, damaged wiring or connectors, low battery voltage, or a failing voltage sensor.

3. How can I diagnose OBDII code P1FD5 in my Buick Hybrid/EV vehicle?

- Diagnosing OBDII code P1FD5 may involve using an OBDII scanner to retrieve the code, checking the hybrid/EV system components for visible damage, testing the voltage sensor, and inspecting the wiring and connectors for any issues.

4. Can I continue to drive my Buick Hybrid/EV vehicle with OBDII code P1FD5 present?

- It is not recommended to continue driving a Buick Hybrid/EV vehicle with OBDII code P1FD5 present, as it can lead to further damage to the hybrid/EV system and potentially affect the vehicle's performance and safety.

5. How can I repair OBDII code P1FD5 in my Buick Hybrid/EV vehicle?

- Repairing OBDII code P1FD5 may involve replacing the hybrid/EV battery interface control module, repairing or replacing damaged wiring or connectors, ensuring the battery voltage is at the correct level, and resetting the fault codes using a diagnostic tool.

6. Are there any DIY tips for addressing OBDII code P1FD5 in a Buick Hybrid/EV vehicle?

- DIY tips for addressing OBDII code P1FD5 may include checking the battery connections, inspecting the wiring harness for any visible damage, and ensuring the battery voltage is within the specified range before seeking professional help.

7. What is the role of the Hybrid/EV Battery Interface Control Module 1 Voltage Sensor in a Buick Hybrid/EV vehicle?

- The Hybrid/EV Battery Interface Control Module 1 Voltage Sensor is responsible for monitoring the voltage levels in the battery system to ensure proper functioning and performance of the hybrid/EV components.

8. Can weather conditions impact the occurrence of OBDII code P1FD5 in a Buick Hybrid/EV vehicle?

- Extreme weather conditions, such as extreme cold or heat, can sometimes affect the performance of the hybrid/EV battery system and potentially trigger OBDII code P1FD5 in a Buick Hybrid/EV vehicle.

9. Is it necessary to visit a dealership for repairs related to OBDII code P1FD5 in a Buick Hybrid/EV vehicle?

- While visiting a dealership with specialized hybrid/EV technicians is recommended for accurate diagnosis and repairs related to OBDII code P1FD5, independent hybrid/EV specialists may also be able to address the issue effectively.

10. What steps can I take to prevent OBDII code P1FD5 from recurring in my Buick Hybrid/EV vehicle?

- To prevent OBDII code P1FD5 from recurring, regular maintenance of the hybrid/EV system, checking the battery voltage levels, and addressing any warning signs promptly can help maintain the health of the system and prevent future issues.