OBD Guide

P04F1

EVAP System Purge Line Performance

P04F1 is an OBD-II diagnostic trouble code meaning: EVAP System Purge Line Performance. Common causes: purge line clogged, purge valve malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Check Engine light comes on
  • Increased fuel consumption
  • Smell of fuel in the cabin
  • Problems starting the engine

Causes

  • Purge line clogged
  • Purge valve malfunction
  • EVAP system leak
  • Problems with fuel tank sealing
  • Fuel tank pressure sensor malfunction

How to Fix

  1. Check the EVAP system for leaks
  2. Inspect the purge line for blockages
  3. Check the functionality of the purge valve
  4. Replace faulty components
  5. Clean or replace purge line

Related codes

Error P04F1 by Vehicle Brand

FAQ

What does the P04F1 code mean?

P04F1 is an OBD-II diagnostic trouble code that indicates: EVAP System Purge Line Performance

What causes a P04F1 error code?

The most common causes of P04F1 include: Purge line clogged; Purge valve malfunction; EVAP system leak; Problems with fuel tank sealing.

How do I fix a P04F1 diagnostic trouble code?

To fix P04F1: Check the EVAP system for leaks. Inspect the purge line for blockages. Check the functionality of the purge valve. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P04F1?

Limited driving only, diagnose soon

How much does it cost to fix P04F1?

The estimated repair cost for P04F1 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat