OBD Guide
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P1459

EVAP Emission Purge Flow Switch Malfunction

P1459 is an OBD-II diagnostic trouble code meaning: EVAP Emission Purge Flow Switch Malfunction. Common causes: evap purge valve malfunction, open or short circuit in valve circuit. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Check Engine light comes on
  • Increased fuel consumption
  • Unstable engine idling
  • Smell of gasoline in or around the car

Causes

  • EVAP purge valve malfunction
  • Open or short circuit in valve circuit
  • Purge valve clogged
  • EVAP system leak
  • Problems with the control signal from the ECU

How to Fix

  1. Check the integrity of the purge valve circuit
  2. Check the resistance of the purge valve
  3. Clean or replace purge valve
  4. Check the EVAP system for leaks
  5. Check control signals from the computer

Related codes

P0440P0441P0446

Error P1459 by Vehicle Brand

AcuraBMWHondaInfinitiVolkswagen

FAQ

What does the P1459 code mean?

P1459 is an OBD-II diagnostic trouble code that indicates: EVAP Emission Purge Flow Switch Malfunction

What causes a P1459 error code?

The most common causes of P1459 include: EVAP purge valve malfunction; Open or short circuit in valve circuit; Purge valve clogged; EVAP system leak.

How do I fix a P1459 diagnostic trouble code?

To fix P1459: Check the integrity of the purge valve circuit. Check the resistance of the purge valve. Clean or replace purge valve. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1459?

Yes, but get it checked soon

How much does it cost to fix P1459?

The estimated repair cost for P1459 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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