AutoCodes – Generic – P1FFB

P1FFB Code - Hybrid/EV Battery Pack Coolant Level Sensor Circuit

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
P1FFB indicates Hybrid/EV Battery Pack Coolant Level Sensor Circuit.
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 1,768
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 27, 2020
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Code P1FFB 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 P1FFB - Hybrid/EV Battery Pack Coolant Level Sensor Circuit - AutoCodes.com
P1FFB Code - Hybrid/EV Battery Pack Coolant Level Sensor Circuit

What are the Possible Causes of the DTC P1FFB?

  • 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 P1FFB?

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 P1FFB 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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Information for Specific Makes

  • P1FFB Buick β€” Hybrid/EV Battery Pack Coolant Level Sensor Circuit
  • P1FFB Cadillac β€” Hybrid/EV Battery Pack Coolant Level Sensor Circuit
  • P1FFB Chevrolet β€” Hybrid/EV Battery Pack Coolant Level Sensor Circuit
  • P1FFB GMC β€” Hybrid/EV Battery Pack Coolant Level Sensor Circuit
  • P1FFB Saturn β€” Hybrid/EV Battery Pack Coolant Level Sensor Circuit
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 P1FFB Code

1. What are common symptoms of OBDII code P1FFB?

- Common symptoms include the illumination of the Check Engine Light, reduced hybrid/EV system performance, and potential issues with the battery pack cooling system.

2. What does the OBDII code P1FFB indicate about the Hybrid/EV Battery Pack Coolant Level Sensor Circuit?

- This code indicates a problem with the circuit related to the coolant level sensor in the hybrid/EV battery pack, which monitors the coolant level to ensure proper cooling.

3. What are possible causes of OBDII code P1FFB being triggered?

- Causes may include a faulty coolant level sensor, damaged wiring or connectors in the circuit, low coolant level in the battery pack, or issues with the battery cooling system.

4. How can I diagnose the issue related to OBDII code P1FFB at home?

- You can start by visually inspecting the coolant level sensor and its connections, checking the battery pack coolant level, and using an OBDII scanner to read and clear the code for initial troubleshooting.

5. Is it safe to continue driving with OBDII code P1FFB present?

- It is generally not recommended to continue driving with this code present, as it can lead to potential cooling system issues and affect the performance and safety of the hybrid/EV system.

6. How can I repair OBDII code P1FFB related to the Hybrid/EV Battery Pack Coolant Level Sensor Circuit?

- Repair options may include replacing the coolant level sensor, repairing damaged wiring or connectors, refilling the battery pack coolant to the proper level, and ensuring the battery cooling system is functioning correctly.

7. Can resetting the OBDII code P1FFB clear the issue permanently?

- Resetting the code may temporarily clear the Check Engine Light, but if the underlying issue with the coolant level sensor circuit is not addressed, the code is likely to reappear.

8. Are there any specific maintenance tips to prevent OBDII code P1FFB from recurring?

- Regularly checking the battery pack coolant level, inspecting the sensor and circuit for any signs of damage, and maintaining the cooling system can help prevent the recurrence of this code.

9. Is it necessary to visit a dealership or a specialized mechanic to address OBDII code P1FFB?

- While a dealership or specialized mechanic with experience in hybrid/EV systems can provide expert diagnosis and repair, basic troubleshooting and repairs related to this code can be done at home or by a general automotive technician.

10. What are the potential risks of ignoring OBDII code P1FFB for an extended period?

- Ignoring this code can lead to overheating of the battery pack, reduced efficiency of the hybrid/EV system, potential damage to the battery components, and an increased risk of safety hazards.

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