AutoCodes – Cadillac – P1F44 Cadillac

P1F44 Cadillac 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 Cadillac 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 846
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 Cadillac 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 Cadillac - Hybrid/EV Electronics Coolant Pump Enable Circuit Low Voltage - AutoCodes.com
P1F44 Cadillac Code - Hybrid/EV Electronics Coolant Pump Enable Circuit Low Voltage

What are the Possible Causes of the DTC P1F44 Cadillac?

  • 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 Cadillac?

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 Cadillac 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 Cadillac code?

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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 P1F44 Cadillac Code

1. What are the common symptoms of OBDII code P1F44 on a Cadillac Hybrid/EV system?

- Common symptoms include overheating of the hybrid/EV system, reduced cooling performance, and potential warning lights on the dashboard.

2. What are the possible causes of the Hybrid/EV Electronics Coolant Pump Enable Circuit Low Voltage code P1F44 on a Cadillac?

- Possible causes include a malfunctioning coolant pump, faulty wiring or connectors, low coolant levels, or a problem with the hybrid/EV electronics control module.

3. How serious is the OBDII code P1F44 on a Cadillac Hybrid/EV system?

- This code indicates a potential issue with the coolant pump enable circuit, which can lead to overheating of the system. It is important to address this issue promptly to prevent further damage.

4. Can I continue driving my Cadillac with the P1F44 code present?

- It is not recommended to continue driving the vehicle with the P1F44 code active, as it can lead to overheating and potential damage to the hybrid/EV system components.

5. How can I diagnose and repair the Hybrid/EV Electronics Coolant Pump Enable Circuit Low Voltage code P1F44 on my Cadillac?

- Diagnosis typically involves checking the coolant pump, inspecting wiring and connectors for damage, testing the coolant level, and scanning the hybrid/EV system for any related faults. Repairs may involve replacing the coolant pump, repairing wiring, or addressing any underlying issues.

6. Are there any DIY solutions for fixing the P1F44 code on a Cadillac Hybrid/EV system?

- DIY solutions may include checking and topping up coolant levels, inspecting wiring for visible damage, and ensuring connectors are securely attached. However, complex repairs may require professional expertise.

7. Does the P1F44 code on a Cadillac always require replacement of the coolant pump?

- Not necessarily. While a faulty coolant pump is a common cause of this code, it is important to diagnose the issue accurately to determine if pump replacement is necessary or if there are other underlying causes.

8. Can a low battery voltage trigger the P1F44 code on a Cadillac Hybrid/EV system?

- Yes, low battery voltage or electrical system issues can sometimes affect the proper functioning of the coolant pump enable circuit, leading to the P1F44 trouble code.

9. Is it safe to reset the OBDII code P1F44 on a Cadillac Hybrid/EV system without addressing the underlying issue?

- Resetting the code without addressing the underlying issue can temporarily clear the warning light, but the problem will likely reoccur. It is important to diagnose and repair the root cause to prevent further complications.

10. What should I do if the P1F44 code persists after repairs on my Cadillac Hybrid/EV system?

- If the code persists after repairs, recheck the coolant pump, wiring, and connectors for proper functionality. It may also be necessary to perform further diagnostics or seek assistance from a professional technician specializing in hybrid/EV systems.

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