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AutoCodes – Generic – P1FFE

P1FFE 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 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 2,822
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on Apr 27, 2020
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Code P1FFE 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 - Hybrid/EV Battery Pack Coolant Level Low - AutoCodes.com
P1FFE Code - Hybrid/EV Battery Pack Coolant Level Low
What does this mean?

What are the Possible Causes of the DTC P1FFE?

  • 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?

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 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 P1FFE code?

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Need Help with the Code?

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Information for Specific Makes

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 Code

1. What does the OBDII code P1FFE mean?

P1FFE indicates that the hybrid or EV battery pack's coolant level is low, which can affect the battery's thermal management system.

2. What are the symptoms of code P1FFE?

Common symptoms include reduced hybrid or EV performance, overheating of the battery pack, and potential warning lights on the dashboard.

3. What causes the P1FFE code to appear?

The code can be caused by a low coolant level, a leak in the coolant system, a faulty coolant level sensor, or improper maintenance of the cooling system.

4. Can driving with a P1FFE code damage my vehicle?

Yes, ignoring this code can lead to overheating of the battery pack, which may cause permanent damage to the battery or other components.

5. How can I fix the P1FFE code?

First, check the coolant level in the battery pack cooling system and refill it if necessary. Inspect for leaks or damage in the coolant system and replace faulty components like the coolant sensor or hoses.

6. How do I know if the coolant level sensor is faulty?

If the coolant level is adequate but the P1FFE code persists, the sensor may be malfunctioning and should be tested or replaced.

7. What type of coolant is used in a hybrid or EV battery pack?

Always use the manufacturer-recommended coolant specified in your vehicle’s owner’s manual to avoid compatibility issues.

8. Is it safe to continue driving with the P1FFE code?

It is not recommended, as low coolant levels can lead to overheating and potential damage to the battery pack.

9. How do I check for coolant leaks in the battery cooling system?

Inspect hoses, connections, and the cooling reservoir for signs of leakage, such as dampness, visible cracks, or puddles under the vehicle.

10. Can a software update clear the P1FFE code?

A software update alone is unlikely to fix this code. The root cause, such as low coolant or a faulty sensor, must be addressed first.

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