AutoCodes – GMC – P1FFB GMC

P1FFB GMC 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 GMC 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 802
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 GMC 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 GMC - Hybrid/EV Battery Pack Coolant Level Sensor Circuit - AutoCodes.com
P1FFB GMC Code - Hybrid/EV Battery Pack Coolant Level Sensor Circuit

What are the Possible Causes of the DTC P1FFB GMC?

  • 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 GMC?

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 GMC 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 P1FFB GMC Code

1. What are common symptoms of OBDII code P1FFB GMC related to the Hybrid/EV Battery Pack Coolant Level Sensor Circuit?

The common symptoms include a check engine light illuminated on the dashboard, reduced hybrid/EV system performance, and potential issues with the battery cooling system.

2. What are possible causes of OBDII code P1FFB GMC indicating an issue with the Hybrid/EV Battery Pack Coolant Level Sensor Circuit?

Possible causes include a faulty battery coolant level sensor, damaged wiring or connectors in the sensor circuit, low coolant level in the battery pack, or an issue with the hybrid/EV system's cooling system.

3. How can I diagnose the source of OBDII code P1FFB GMC related to the Hybrid/EV Battery Pack Coolant Level Sensor Circuit?

Diagnosis typically involves using a diagnostic scanner to read the code, checking the battery coolant level, inspecting the sensor and its connections for damage, and testing the sensor's functionality.

4. Can I drive my vehicle with OBDII code P1FFB GMC triggered due to issues with the Hybrid/EV Battery Pack Coolant Level Sensor Circuit?

It is not recommended to drive the vehicle with this code triggered, as it can lead to further damage to the hybrid/EV system components. It's best to address the issue promptly.

5. What are the repair options for addressing OBDII code P1FFB GMC related to the Hybrid/EV Battery Pack Coolant Level Sensor Circuit?

Repair options may include replacing the battery coolant level sensor, repairing or replacing damaged wiring or connectors, topping up the coolant level in the battery pack, and ensuring proper functioning of the cooling system.

6. Is it possible to reset OBDII code P1FFB GMC without fixing the underlying issue with the Hybrid/EV Battery Pack Coolant Level Sensor Circuit?

While clearing the code may temporarily turn off the check engine light, it will not resolve the underlying issue. It's crucial to address the root cause to prevent potential damage to the hybrid/EV system.

7. How critical is it to address OBDII code P1FFB GMC associated with the Hybrid/EV Battery Pack Coolant Level Sensor Circuit?

It is important to address this code promptly to ensure the proper functioning of the hybrid/EV system and prevent potential overheating or damage to the battery pack. Ignoring the issue can lead to more significant problems.

8. Are there any preventive maintenance steps to avoid triggering OBDII code P1FFB GMC related to the Hybrid/EV Battery Pack Coolant Level Sensor Circuit?

Regularly checking the battery coolant level, inspecting the sensor and its connections for damage, and maintaining the cooling system can help prevent issues that may trigger this code.

9. Can a DIY enthusiast repair OBDII code P1FFB GMC linked to the Hybrid/EV Battery Pack Coolant Level Sensor Circuit?

While some basic checks like inspecting connections can be done by a DIY enthusiast, diagnosing and repairing issues with the sensor circuit may require specialized tools and expertise. It is recommended to consult a professional mechanic for complex repairs.

10. What is the typical cost of repairing OBDII code P1FFB GMC due to problems with the Hybrid/EV Battery Pack Coolant Level Sensor Circuit?

The cost of repair can vary depending on the exact cause of the issue, the extent of the damage, and labor rates in your area. It's advisable to get a diagnostic inspection from a qualified mechanic to determine the cost accurately.

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