OBD Guide
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P1F44

Hybrid/EV Electronics Coolant Pump Enable Circuit Low Voltage

P1F44 is an OBD-II diagnostic trouble code meaning: Hybrid/EV Electronics Coolant Pump Enable Circuit Low Voltage. Common causes: problems with wiring or connections, faulty pump relay. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • Hybrid System Overheat Warning
  • Reduced engine power
  • Turning on the check engine warning light
  • Unstable operation of the hybrid system
  • Noisy coolant pump

Causes

  • Problems with wiring or connections
  • Faulty pump relay
  • Poor contact in connectors
  • Coolant pump malfunction
  • Problems with the hybrid system control unit

How to Fix

  1. Check the wiring and connections of the pump
  2. Check the condition of the pump relay
  3. Check connectors and contacts for corrosion
  4. Check the functionality of the coolant pump
  5. Check control circuit voltage

Related codes

P1F45P1F46

FAQ

What does the P1F44 code mean?

P1F44 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Electronics Coolant Pump Enable Circuit Low Voltage

What causes a P1F44 error code?

The most common causes of P1F44 include: Problems with wiring or connections; Faulty pump relay; Poor contact in connectors; Coolant pump malfunction.

How do I fix a P1F44 diagnostic trouble code?

To fix P1F44: Check the wiring and connections of the pump. Check the condition of the pump relay. Check connectors and contacts for corrosion. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1F44?

Limited driving only, diagnose soon

How much does it cost to fix P1F44?

The estimated repair cost for P1F44 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat