AutoCodes – Buick – P1FF1 Buick

P1FF1 Buick Code - Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Performance

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: P1FF1 Buick indicates Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Performance.
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 968

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 P1FF1 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 P1FF1 Buick - Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Performance - AutoCodes.com — P1FF1 Buick Code - Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P1FF1 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 P1FF1 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 P1FF1 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 P1FF1 Buick Code

1. What does the OBDII code P1FF1 mean for my Buick?

The P1FF1 code indicates a performance issue with the voltage sensor in the Hybrid/EV Battery Interface Control Module 9.

2. What are the symptoms of code P1FF1 in a Buick?

Common symptoms include reduced fuel efficiency, hybrid/EV system warnings, and potential loss of electric drive functionality.

3. What causes the P1FF1 code to appear in a Buick?

Causes may include a faulty voltage sensor, wiring issues, poor electrical connections, or a malfunctioning Hybrid/EV Battery Interface Control Module.

4. Can I drive my Buick with the P1FF1 code active?

Driving with this code may be possible, but it can lead to reduced performance and potential damage to the hybrid/EV battery system. Itâ€™s better to address the issue promptly.

5. How is code P1FF1 diagnosed?

A technician will use a scan tool to confirm the code, inspect the voltage sensor and wiring, and perform tests on the Hybrid/EV Battery Interface Control Module.

6. How do I fix the P1FF1 code on my Buick?

Repairs may involve replacing the voltage sensor, repairing damaged wiring, or replacing the Hybrid/EV Battery Interface Control Module if necessary.

7. Is the P1FF1 code common in Buick vehicles?

This code is more specific to hybrid and EV models and is less common than standard diagnostic codes.

8. How much does it cost to repair the P1FF1 code in a Buick?

Repair costs depend on the exact cause but may range from $150 to $1,000, depending on whether sensor replacement or module repair is needed.

9. Can a dead hybrid battery trigger the P1FF1 code?

A failing hybrid battery can contribute to voltage sensor issues, but the code typically points to a sensor or interface module problem rather than the battery itself.

10. Does clearing the P1FF1 code fix the issue?

Clearing the code may temporarily remove the warning, but the underlying problem must be addressed to prevent the code from returning.