AutoCodes – Buick – P1FDD Buick

P1FDD Buick Code - Hybrid/EV Battery Interface Control Module 9 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: P1FDD Buick indicates Hybrid/EV Battery Interface Control Module 9 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 716

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 P1FDD 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 P1FDD Buick - Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit Low Voltage - AutoCodes.com — P1FDD Buick Code - Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1FDD 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 P1FDD 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 P1FDD 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 P1FDD Buick Code

1. What are the common symptoms of OBDII code P1FDD in a Buick related to the Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit Low Voltage?

- Common symptoms include poor hybrid system performance, reduced fuel efficiency, and potential warning lights such as the check engine light or hybrid system warning.

2. What are the possible causes of the OBDII code P1FDD in a Buick Hybrid/EV vehicle?

- Possible causes include a faulty Hybrid/EV Battery Interface Control Module 9, issues with the voltage sensor circuit, low battery voltage, or wiring problems.

3. How can I diagnose the Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit Low Voltage issue in my Buick?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific code, checking the battery voltage levels, inspecting the wiring for damage, and testing the voltage sensor circuit.

4. Can I still drive my Buick if I have the P1FDD code related to the Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit Low Voltage?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the hybrid system and potentially affect the vehicle's performance.

5. How can I repair the OBDII code P1FDD in my Buick Hybrid/EV vehicle?

- Repair options may include replacing the Hybrid/EV Battery Interface Control Module 9, repairing or replacing wiring harnesses, ensuring proper battery voltage levels, and clearing the trouble code with an OBDII scanner.

6. Will resetting the trouble code associated with the Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit Low Voltage fix the issue?

- Resetting the code may temporarily clear the warning lights, but it is important to diagnose and address the underlying cause to prevent the problem from recurring.

7. Are there any specific maintenance tips to prevent the P1FDD code from appearing in my Buick Hybrid/EV vehicle?

- Regularly inspecting the hybrid system components, ensuring proper battery maintenance, and addressing any warning lights or performance issues promptly can help prevent the occurrence of this trouble code.

8. Can a DIY enthusiast with automotive experience repair the Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit Low Voltage issue?

- While some basic troubleshooting and repairs can be done by DIY enthusiasts, diagnosing and repairing complex hybrid system issues may require specialized tools and expertise best handled by a professional technician.

9. How long does it typically take to repair the Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit Low Voltage issue in a Buick?

- Repair times can vary depending on the specific cause of the problem, but it may take several hours to a full day to diagnose, repair, and test the system thoroughly.

10. Is it safe to continue driving my Buick if I suspect an issue related to the Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit Low Voltage?

- It is recommended to have the vehicle inspected by a qualified technician as soon as possible to prevent potential damage to the hybrid system and ensure the safety and performance of the vehicle.