OBD Guide
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P19FB

Hybrid/EV Electronics Coolant Pump Feedback Circuit Low Frequency

P19FB is an OBD-II diagnostic trouble code meaning: Hybrid/EV Electronics Coolant Pump Feedback Circuit Low Frequency. Common causes: cooling pump malfunction, problems with the pump wiring harness. Estimated repair cost: $167–444.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$167–444 (est.)

Symptoms

  • Hybrid system power reduction
  • Overheat warning on dashboard
  • Increased noise from the cooling pump
  • Reduced performance of the hybrid system
  • Activation of emergency operation

Causes

  • Cooling pump malfunction
  • Problems with the pump wiring harness
  • Control module malfunction
  • Low coolant level
  • Cooling system is dirty or clogged

How to Fix

  1. Check the level and condition of the coolant
  2. Diagnose the operation of the cooling pump
  3. Check the integrity of the wiring harness and connectors
  4. Test the pump control module
  5. If necessary, replace the cooling pump

Related codes

P19FAP19FCP0A80

FAQ

What does the P19FB code mean?

P19FB is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Electronics Coolant Pump Feedback Circuit Low Frequency

What causes a P19FB error code?

The most common causes of P19FB include: Cooling pump malfunction; Problems with the pump wiring harness; Control module malfunction; Low coolant level.

How do I fix a P19FB diagnostic trouble code?

To fix P19FB: Check the level and condition of the coolant. Diagnose the operation of the cooling pump. Check the integrity of the wiring harness and connectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P19FB?

Limited driving only, diagnose soon

How much does it cost to fix P19FB?

The estimated repair cost for P19FB is $167–444. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat