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P1459 Honda Code - EVAP Emission Purge Flow Switch Malfunction

Quick Answer

The P1459 Honda code indicates a malfunction in the EVAP (Evaporative Emission Control) system's purge flow switch. Common causes include Faulty purge flow switch, Clogged charcoal canister, Damaged EVAP purge solenoid. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1459 Honda indicates EVAP Emission Purge Flow Switch Malfunction.
Common causes
Common causes include Faulty purge flow switch, Clogged charcoal canister, Damaged EVAP purge solenoid.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1459 Honda Description

The P1459 Honda code indicates a malfunction in the EVAP (Evaporative Emission Control) system's purge flow switch. The EVAP system is responsible for capturing and storing fuel vapors from the fuel tank to prevent them from escaping into the atmosphere. The purge flow switch is a crucial component that controls the flow of fuel vapors from the charcoal canister to the engine for combustion.

OBDII Code P1459 Honda - EVAP Emission Purge Flow Switch Malfunction
P1459 Honda Code - EVAP Emission Purge Flow Switch Malfunction

Common Causes of P1459 Honda

  1. Faulty purge flow switch
  2. Clogged charcoal canister
  3. Damaged EVAP purge solenoid
  4. Leak in the EVAP system

Symptoms of P1459 Honda

  1. Check engine light illuminated
  2. Rough idling
  3. Poor fuel efficiency
  4. Difficulty starting or stalling
  5. Increased emissions

How to Fix P1459 Honda

  1. Perform a diagnostic scan to confirm the P1459 code and identify the specific component causing the issue.
  2. Inspect the EVAP system components, including the purge flow switch, charcoal canister, and purge solenoid, for any signs of damage or clogging.
  3. Replace the faulty component causing the malfunction, whether it be the purge flow switch, charcoal canister, or purge solenoid.
  4. Clear the diagnostic trouble codes and reset the check engine light.
  5. Perform a test drive to ensure the issue has been resolved and the check engine light remains off.

Cost to Fix P1459 Honda

The typical repair costs for addressing a P1459 Honda code can range from $150 to $500, depending on the specific component that needs to be replaced and the labor involved. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Additionally, factors such as the vehicle's make and model, location, and engine type can also impact the overall repair costs.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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