AutoCodes – Buick – P1FFE Buick

P1FFE Buick Code - Hybrid/EV Battery Pack Coolant Level Low

Quick Answer

The hybrid/EV battery pack coolant system has a level sensor. Common causes include Faulty Hybrid/EV Powertrain Control Module 2, Hybrid/EV Powertrain Control Module 2 harness is open or shorted, Hybrid/EV Powertrain Control Module 2 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: P1FFE Buick indicates Hybrid/EV Battery Pack Coolant Level Low.
Common causes: Common causes include Faulty Hybrid/EV Powertrain Control Module 2, Hybrid/EV Powertrain Control Module 2 harness is open or shorted, Hybrid/EV Powertrain Control Module 2 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 788

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 P1FFE Buick Description

The hybrid/EV battery pack coolant system has a level sensor. The hybrid/EV battery pack coolant level sensor is attached to the coolant surge tank. The level sensor is a 2 state bi-metallic reed switch which changes state when the switch reed is exposed to magnetism. The level of the hybrid/EV battery pack coolant in the surge tank causes a magnet-equipped float to move towards and away from the sensor as coolant level decreases or increases. The hybrid/EV powertrain control module 2 supplies 5 V to the signal circuit and a ground for the low reference circuit. The hybrid/EV battery pack coolant level sensor resistance decreases when the battery coolant level in the surge tank gets low. The hybrid/EV powertrain control module 2 uses the hybrid/EV battery pack coolant level sensor to determine if the hybrid/EV battery pack coolant system is low on coolant.

OBDII Code P1FFE Buick - Hybrid/EV Battery Pack Coolant Level Low - AutoCodes.com — P1FFE Buick Code - Hybrid/EV Battery Pack Coolant Level Low

What does this mean?

What are the Possible Causes of the DTC P1FFE Buick?

Faulty Hybrid/EV Powertrain Control Module 2
Hybrid/EV Powertrain Control Module 2 harness is open or shorted
Hybrid/EV Powertrain Control Module 2 circuit poor electrical connection

How to Fix the DTC P1FFE 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 P1FFE 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 P1FFE Buick Code

1. What does the OBDII code P1FFE mean on a Buick?

The P1FFE code indicates that the hybrid/EV battery pack coolant level is low, which can affect the cooling system's ability to regulate the battery temperature.

2. What are the common symptoms of the P1FFE code?

Symptoms may include an illuminated check engine light, reduced vehicle performance, overheating warnings, or limited EV mode functionality.

3. What causes the P1FFE code to appear?

This code is typically caused by a low coolant level in the hybrid/EV battery cooling system, leaks in the cooling system, or a faulty coolant level sensor.

4. Can I drive my Buick with the P1FFE code active?

Driving with the P1FFE code is not recommended, as insufficient coolant can lead to overheating of the battery pack and potentially cause severe damage.

5. How do I fix the P1FFE code on my Buick?

Start by checking the coolant level in the hybrid/EV battery cooling reservoir. Top it off with the manufacturer-specified coolant if low, and inspect for any leaks or sensor issues.

6. How can I check for coolant leaks in the battery cooling system?

Look for visible signs of coolant around the reservoir, hoses, and connections. A pressure test may also be needed to detect any hidden leaks in the system.

7. What type of coolant should I use for the hybrid/EV battery pack?

Refer to your Buickâ€™s ownerâ€™s manual for the recommended coolant type. Using the correct coolant is critical for the system's performance and longevity.

8. Could a faulty sensor trigger the P1FFE code?

Yes, a malfunctioning coolant level sensor can falsely trigger the P1FFE code even if the coolant level is adequate.

9. How much does it cost to repair issues causing the P1FFE code?

The cost depends on the root cause. Coolant top-off is inexpensive, but fixing leaks or replacing sensors can range from $100 to $500 or more, depending on labor and parts.

10. Can ignoring the P1FFE code damage the battery pack?

Yes, ignoring this code can lead to insufficient cooling, which may cause the hybrid/EV battery pack to overheat and suffer permanent damage.