AutoCodes – Buick – P1FAA Buick

P1FAA Buick Code - Hybrid/EV Battery Interface Control Module 9 Not Programmed

Quick Answer

When the Battery Energy Control Module is flash programmed, the Hybrid/EV Battery Interface Control Module operating software and calibrations are provided to the Battery Energy Control Module. Common causes include Reprogram Hybrid/EV Battery Interface Control Module, Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted. 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: P1FAA Buick indicates Hybrid/EV Battery Interface Control Module 9 Not Programmed.
Common causes: Common causes include Reprogram Hybrid/EV Battery Interface Control Module, Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted.
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 775

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 P1FAA Buick Description

When the Battery Energy Control Module is flash programmed, the Hybrid/EV Battery Interface Control Module operating software and calibrations are provided to the Battery Energy Control Module. The Hybrid/EV Battery Interface Control Module software and calibrations are then loaded to each of the Hybrid/EV Battery Interface Control Modules from the Battery Energy Control Module. This operation is automatic and requires no operator action. At this point, if any of the Hybrid/EV Battery Interface Control Modules are not programmed correctly, the appropriate DTC is set.
This fault is internal to the Hybrid/EV Battery Interface Control Modules and no external circuits are involved.

OBDII Code P1FAA Buick - Hybrid/EV Battery Interface Control Module 9 Not Programmed - AutoCodes.com — P1FAA Buick Code - Hybrid/EV Battery Interface Control Module 9 Not Programmed

What does this mean?

What are the Possible Causes of the DTC P1FAA Buick?

Reprogram Hybrid/EV Battery Interface Control Module
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 P1FAA 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 P1FAA 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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Need Help with the Code?

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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 P1FAA Buick Code

1. What does the OBDII code P1FAA mean on a Buick?

P1FAA indicates that the Hybrid/EV Battery Interface Control Module 9 is not programmed or has a software issue.

2. What are common symptoms of the P1FAA code on a Buick?

Common symptoms include illuminated warning lights, reduced hybrid/EV performance, failure to switch between power modes, or vehicle entering limp mode.

3. What causes the P1FAA code to appear?

The primary cause is the Hybrid/EV Battery Interface Control Module 9 not being properly programmed or having a corrupted calibration file.

4. Can a dead battery cause the P1FAA code?

Yes, a dead or disconnected 12V battery can cause the module to lose its programming, triggering the P1FAA code.

5. How do I fix the P1FAA code on a Buick?

Reprogram the Hybrid/EV Battery Interface Control Module 9 using a GM-approved scan tool or consult a dealership for proper calibration.

6. Is the P1FAA code specific to certain Buick models?

Yes, it typically applies to Buick hybrid or electric vehicles equipped with battery interface control modules.

7. Can I drive with the P1FAA code active?

Driving with the P1FAA code is not recommended as it may lead to reduced performance or further damage to hybrid/EV components.

8. How much does it cost to repair the P1FAA code?

The cost varies but generally includes diagnostic fees and programming, which can range from $150 to $500 at most dealerships or repair shops.

9. Will disconnecting the battery clear the P1FAA code?

No, disconnecting the battery will not resolve the issue. The module must be reprogrammed to clear the code.

10. Can an independent mechanic fix the P1FAA code?

Some independent mechanics with GM-certified scan tools may be able to reprogram the module, but itâ€™s often best to visit a dealership for this type of repair.