AutoCodes – Buick – P1FFD Buick

P1FFD Buick Code - Hybrid/EV Battery Pack Coolant Level Sensor Circuit High Voltage

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: P1FFD Buick indicates Hybrid/EV Battery Pack Coolant Level Sensor Circuit High Voltage.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 787

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1FFD 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 P1FFD Buick - Hybrid/EV Battery Pack Coolant Level Sensor Circuit High Voltage - AutoCodes.com — P1FFD Buick Code - Hybrid/EV Battery Pack Coolant Level Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1FFD 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 P1FFD 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 P1FFD 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.

Need more information about the P1FFD Buick code?

Need more information on how to fix the P1FFD Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1FFD Buick code diagnosed by a professional: Find a repair shop in your area

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 P1FFD Buick Code

What does the OBDII code P1FFD mean for a Buick?

The P1FFD code indicates an issue with the Hybrid/EV battery pack coolant level sensor circuit, specifically detecting high voltage in the sensor circuit.

What are the common symptoms of code P1FFD?

Symptoms may include an illuminated check engine light, reduced hybrid/EV performance, or warning messages related to the battery system.

What causes the P1FFD code to appear?

Potential causes include a faulty coolant level sensor, damaged wiring or connectors in the sensor circuit, or an issue with the battery pack control module.

Can I drive my Buick with the P1FFD code active?

Itâ€™s not recommended to drive for long periods with this code active, as it may indicate an issue that could lead to overheating or damage to the battery pack.

How do I diagnose the P1FFD code?

Start by inspecting the coolant level sensor, its wiring, and connectors for damage or corrosion. Use a scan tool to monitor the sensor readings and check for proper voltage and continuity.

Does the P1FFD code mean the battery pack is damaged?

Not necessarily. The code typically points to an electrical issue with the coolant level sensor circuit, not the battery pack itself.

How do I fix the P1FFD code?

Repairs may involve replacing the coolant level sensor, repairing damaged wiring or connectors, or reprogramming the battery control module if needed.

Could low coolant levels trigger the P1FFD code?

Low coolant levels might indirectly cause the code if the sensor detects a fault due to insufficient fluid, but the code specifically relates to electrical circuit issues.

What tools are needed to troubleshoot the P1FFD code?

A scan tool capable of reading hybrid/EV codes, a multimeter for checking voltages and continuity, and basic hand tools for inspecting and repairing wiring and components.

How much does it cost to fix the P1FFD code on a Buick?

Repair costs can range from $100 to $500, depending on whether the issue is a simple wiring fix, sensor replacement, or module reprogramming.