AutoCodes – GMC – P1F44 GMC

P1F44 GMC Code - Hybrid/EV Electronics Coolant Pump Enable Circuit Low Voltage

Quick Answer

The hybrid/EV electronics coolant pump circulates coolant through the power electronics coolant radiator, hybrid/EV powertrain control module 1 and the battery charger to control the temperature of the hybrid/EV powertrain control module 1 and the battery charger. Common causes include Faulty Hybrid/EV Electronics Coolant Pump, Hybrid/EV Electronics Coolant Pump harness is open or shorted, Hybrid/EV Electronics Coolant Pump 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
P1F44 GMC indicates Hybrid/EV Electronics Coolant Pump Enable Circuit Low Voltage.
Common causes
Common causes include Faulty Hybrid/EV Electronics Coolant Pump, Hybrid/EV Electronics Coolant Pump harness is open or shorted, Hybrid/EV Electronics Coolant Pump 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 816
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 26, 2020
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Code P1F44 GMC Description

The hybrid/EV electronics coolant pump circulates coolant through the power electronics coolant radiator, hybrid/EV powertrain control module 1 and the battery charger to control the temperature of the hybrid/EV powertrain control module 1 and the battery charger. An enable signal from the hybrid/EV powertrain control module 2 to the hybrid/EV electronics coolant pump provides overall control of the pump. When this circuit is high, the pump can operate. The pump is controlled with a pulse-width modulated signal from the hybrid/EV powertrain control module 2 to the hybrid/EV electronics coolant pump. The higher the duty cycle the higher the pump speed. The hybrid/EV electronics coolant pump provides a hard-wired pulse-width modulated feedback signal to the hybrid/EV powertrain control module 2. During normal operation, this feedback signal provides pump speed information. The hybrid/EV electronics coolant pump has some self-diagnostic capability. If it determines there is an internal fault it provides this information on this same feedback circuit instead of pump speed information.
OBDII Code P1F44 GMC - Hybrid/EV Electronics Coolant Pump Enable Circuit Low Voltage - AutoCodes.com
P1F44 GMC Code - Hybrid/EV Electronics Coolant Pump Enable Circuit Low Voltage

What are the Possible Causes of the DTC P1F44 GMC?

  • Faulty Hybrid/EV Electronics Coolant Pump
  • Hybrid/EV Electronics Coolant Pump harness is open or shorted
  • Hybrid/EV Electronics Coolant Pump circuit poor electrical connection

How to Fix the DTC P1F44 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 P1F44 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.

Need more information about the P1F44 GMC code?

Need more information on how to fix the P1F44 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1F44 GMC 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 P1F44 GMC Code

1. What are the common symptoms of OBDII code P1F44 in a GMC Hybrid/EV vehicle?

- Common symptoms include poor engine performance, overheating, illumination of the check engine light, and potential issues with the cooling system.

2. What can cause the OBDII code P1F44 in a GMC Hybrid/EV vehicle?

- The code P1F44 is typically triggered by a malfunction in the electronics coolant pump enable circuit, often caused by wiring issues, faulty connectors, or a defective coolant pump.

3. How does the low voltage in the Hybrid/EV electronics coolant pump enable circuit impact the vehicle?

- The low voltage can prevent the coolant pump from operating efficiently, leading to inadequate cooling of the hybrid or electric components and potentially causing damage to the vehicle's systems.

4. Are there any safety concerns associated with OBDII code P1F44 in a GMC Hybrid/EV vehicle?

- Yes, inadequate cooling due to the low voltage in the coolant pump enable circuit can result in overheating of critical components, posing a risk of damage to the vehicle and potentially causing safety hazards.

5. What are some DIY repair tips for addressing OBDII code P1F44 in a GMC Hybrid/EV vehicle?

- DIY repair tips include checking the wiring and connectors for any visible damage, testing the coolant pump for functionality, and ensuring proper electrical connections are secure.

6. Can driving with OBDII code P1F44 in a GMC Hybrid/EV vehicle cause further damage?

- Continuing to drive with code P1F44 can lead to increased risk of overheating, potential damage to other vehicle components, and reduced overall performance of the hybrid or electric system.

7. How can a professional mechanic diagnose OBDII code P1F44 in a GMC Hybrid/EV vehicle?

- A professional mechanic can use a diagnostic scanner to read the code, perform electrical tests on the coolant pump circuit, inspect wiring and connectors, and conduct a thorough cooling system evaluation.

8. Is it safe to reset the OBDII code P1F44 in a GMC Hybrid/EV vehicle without addressing the underlying issue?

- It is not recommended to reset the code without addressing the root cause, as the problem may persist and lead to further complications or potential safety hazards.

9. Can extreme weather conditions affect the occurrence of OBDII code P1F44 in a GMC Hybrid/EV vehicle?

- Yes, extreme temperatures can impact the performance of the coolant pump and the electronics coolant system, potentially exacerbating issues related to low voltage in the enable circuit.

10. How much does it typically cost to repair OBDII code P1F44 in a GMC Hybrid/EV vehicle at a professional auto repair shop?

- The cost of repairing code P1F44 can vary depending on the extent of the issue, but it may involve expenses for parts replacement, labor, diagnostic tests, and any additional repairs needed to ensure the proper functioning of the cooling system.

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