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

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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P1F44 Possible Causes

  • 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

First diagnose P1F44 code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.

Cost of diagnosing the P1F44 code

    Labor: 1.0

    The cost of diagnosing the P1F44 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

P1F44 Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1f44 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 - Hybrid/EV Electronics Coolant Pump Enable Circuit Low Voltage - AutoCodes.com

P1F44 More Information

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P1F44 Information for specific makes

  • P1F44 BUICK Hybrid/EV Electronics Coolant Pump Enable Circuit Low Voltage
  • P1F44 CADILLAC Hybrid/EV Electronics Coolant Pump Enable Circuit Low Voltage
  • P1F44 CHEVROLET Hybrid/EV Electronics Coolant Pump Enable Circuit Low Voltage
  • P1F44 GMC Hybrid/EV Electronics Coolant Pump Enable Circuit Low Voltage
  • P1F44 SATURN Hybrid/EV Electronics Coolant Pump Enable Circuit Low Voltage

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