OBD Guide
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P3074

Engine Coolant Pump High Current

P3074 is an OBD-II diagnostic trouble code meaning: Engine Coolant Pump High Current. Common causes: faulty coolant pump, short circuit in pump wiring. Estimated repair cost: $28–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$28–167 (est.)

Symptoms

  • Check Engine Light Is On
  • The engine is overheating
  • Ineffective cooling system
  • Coolant pump noise
  • Possible loss of engine power

Causes

  • Faulty coolant pump
  • Short circuit in pump wiring
  • Damaged pump connector
  • Engine control module (ECU) malfunction
  • Increased resistance in the pump circuit

How to Fix

  1. Check the pump wiring and connectors for damage or corrosion.
  2. Check the coolant pump for proper operation.
  3. Measure the current drawn by the pump and compare it to the manufacturer's specifications.
  4. Check the engine control module (ECU) for problems.
  5. Replace faulty components such as pump or wiring.

Related codes

P3073P0217P0116

FAQ

What does the P3074 code mean?

P3074 is an OBD-II diagnostic trouble code that indicates: Engine Coolant Pump High Current

What causes a P3074 error code?

The most common causes of P3074 include: Faulty coolant pump; Short circuit in pump wiring; Damaged pump connector; Engine control module (ECU) malfunction.

How do I fix a P3074 diagnostic trouble code?

To fix P3074: Check the pump wiring and connectors for damage or corrosion.. Check the coolant pump for proper operation.. Measure the current drawn by the pump and compare it to the manufacturer's specifications.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P3074?

Do not drive — repair immediately

How much does it cost to fix P3074?

The estimated repair cost for P3074 is $28–167. Actual cost depends on your vehicle, location, and labor rates.

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