AutoCodes – Buick – P1FF2 Buick

P1FF2 Buick Code - Hybrid/EV Battery Interface Control Module 10 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: P1FF2 Buick indicates Hybrid/EV Battery Interface Control Module 10 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 814

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 P1FF2 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 P1FF2 Buick - Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Performance - AutoCodes.com — P1FF2 Buick Code - Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P1FF2 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 P1FF2 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 P1FF2 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 P1FF2 Buick Code

1. What does the OBDII code P1FF2 mean for a Buick?

The P1FF2 code refers to a "Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Performance" issue, indicating a problem with the voltage sensor in the hybrid or EV battery interface control module.

2. What are the symptoms of code P1FF2 in a Buick?

Symptoms may include a check engine light, reduced fuel economy, limited hybrid/EV system performance, or warning messages related to the battery system.

3. What causes the P1FF2 code to appear?

The code can be caused by a faulty voltage sensor, damaged wiring or connectors, software issues in the control module, or battery interface control module failure.

4. Can I drive my Buick with the P1FF2 code?

While the car may still be drivable, it is not recommended as the issue could impact the hybrid/EV system's performance and potentially cause further damage.

5. How is the P1FF2 code diagnosed?

A technician will inspect the battery interface control module, check voltage sensor readings, test wiring and connectors for continuity, and may perform a software update or reprogramming.

6. What repairs can fix the P1FF2 code in a Buick?

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

7. How much does it cost to repair a P1FF2 code on a Buick?

Repair costs can vary widely, typically ranging from $200 to $800 or more, depending on whether the issue is with the sensor, wiring, or the control module.

8. Can a dead hybrid battery cause the P1FF2 code?

A failing or degraded hybrid battery could contribute to the issue, but the P1FF2 code specifically relates to the voltage sensor's performance, not the battery itself.

9. Can I reset the P1FF2 code without repairing the issue?

Clearing the code with a scan tool may temporarily turn off the check engine light, but the code will likely return if the underlying problem isnâ€™t addressed.

10. Is the P1FF2 code covered under warranty for a Buick hybrid or EV?

Depending on the age and mileage of your vehicle, the issue may be covered under the hybrid/EV battery or emissions-related warranty. Check with your dealer for details.