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Engine-Codes – Toyota – P2402 2009 Toyota Prius

P2402 2009 Toyota Prius Code - EVAP System Leak Detection Pump Control Circuit High

Quick Answer

The P2402 diagnostic trouble code (DTC) for a 2009 Toyota Prius specifically refers to an issue with the EVAP (Evaporative Emission Control) system leak detection pump control circuit being too high. Common causes include Faulty leak detection pump, Damaged EVAP system hoses or lines, Loose or damaged electrical connections to the leak detection pump. 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
P2402 2009 Toyota Prius indicates EVAP System Leak Detection Pump Control Circuit High.
Common causes
Common causes include Faulty leak detection pump, Damaged EVAP system hoses or lines, Loose or damaged electrical connections to the leak detection pump.
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 P2402 2009 Toyota Prius Description

The P2402 diagnostic trouble code (DTC) for a 2009 Toyota Prius specifically refers to an issue with the EVAP (Evaporative Emission Control) system leak detection pump control circuit being too high. The EVAP system is responsible for capturing fuel vapors from the fuel tank and preventing them from being released into the atmosphere. The leak detection pump is a key component of this system, as it monitors for leaks in the system by creating a vacuum and checking for pressure changes.

OBDII Code P2402 2009 Toyota Prius - EVAP System Leak Detection Pump Control Circuit High
P2402 2009 Toyota Prius Code - EVAP System Leak Detection Pump Control Circuit High

Common Causes of P2402 2009 Toyota Prius

  1. Faulty leak detection pump
  2. Damaged EVAP system hoses or lines
  3. Loose or damaged electrical connections to the leak detection pump
  4. Corrosion or rust affecting the EVAP system components
  5. Issues with the EVAP system pressure sensor

Symptoms of P2402 2009 Toyota Prius

  1. Check engine light illuminated on the dashboard
  2. Decreased fuel efficiency
  3. Strong fuel odor around the vehicle
  4. Failed emissions test
  5. Rough idling or stalling

How to Fix P2402 2009 Toyota Prius

  1. Diagnose the specific cause of the P2402 code by using an OBD-II scanner to pinpoint the issue.
  2. Inspect the EVAP system components, including the leak detection pump, hoses, and electrical connections, for any signs of damage or wear.
  3. Replace the faulty component causing the code, such as the leak detection pump or damaged hoses.
  4. Clear the DTC from the vehicle's computer system using the OBD-II scanner to reset the check engine light.
  5. Perform a final inspection and test drive to ensure that the repair has resolved the issue and that the code does not reappear.

Cost to Fix P2402 2009 Toyota Prius

The typical repair costs for addressing a P2402 code on a 2009 Toyota Prius can vary depending on the specific cause of the issue and the labor rates in your area. Generally, replacing the leak detection pump or damaged EVAP system components can range from $200 to $500, including parts and labor. Additional diagnostic time may be necessary to pinpoint the exact cause of the code, which can add to the overall repair costs. It's advisable to check with local auto repair shops for more precise estimates based on your location and vehicle specifics.

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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.

Frequently Asked Questions about P2402 2009 Toyota Prius Code

1. What are common symptoms of OBDII code P2402 in a 2009 Toyota Prius?

The common symptoms of OBDII code P2402 in a 2009 Toyota Prius include the check engine light coming on, decreased fuel efficiency, and possible rough idling.

2. What causes the OBDII code P2402 in a 2009 Toyota Prius?

The most common cause of OBDII code P2402 in a 2009 Toyota Prius is a malfunction in the EVAP system leak detection pump control circuit, leading to a high voltage condition.

3. How serious is OBDII code P2402 in a 2009 Toyota Prius?

While OBDII code P2402 may not cause immediate drivability issues, it is important to address the underlying problem promptly to prevent potential damage to the EVAP system and ensure proper vehicle operation.

4. How can I diagnose OBDII code P2402 in a 2009 Toyota Prius?

Diagnosing OBDII code P2402 typically involves using an OBDII scanner to retrieve the code, inspecting the EVAP system components for leaks or damage, and testing the leak detection pump control circuit.

5. Can I drive my 2009 Toyota Prius with OBDII code P2402?

It is generally safe to drive your 2009 Toyota Prius with OBDII code P2402, but it is recommended to have the issue diagnosed and repaired as soon as possible to prevent further complications.

6. How can I repair OBDII code P2402 in a 2009 Toyota Prius?

Repairing OBDII code P2402 in a 2009 Toyota Prius may involve replacing the leak detection pump, repairing or replacing damaged wiring or connectors in the control circuit, or cleaning and testing the EVAP system components.

7. Can a DIY enthusiast fix OBDII code P2402 in a 2009 Toyota Prius?

While some DIY enthusiasts may have the skills to diagnose and repair OBDII code P2402, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure the issue is resolved correctly.

8. How much does it cost to repair OBDII code P2402 in a 2009 Toyota Prius?

The cost to repair OBDII code P2402 in a 2009 Toyota Prius can vary depending on the underlying issue, parts needed for repair, and labor rates. It is advisable to obtain quotes from different mechanics or repair shops.

9. Are there any preventive measures to avoid OBDII code P2402 in a 2009 Toyota Prius?

To help prevent OBDII code P2402 in a 2009 Toyota Prius, regular maintenance of the EVAP system, such as checking for leaks and ensuring proper sealing of components, can be beneficial.

10. Can OBDII code P2402 in a 2009 Toyota Prius cause other problems if left unaddressed?

If left unaddressed, OBDII code P2402 in a 2009 Toyota Prius can potentially lead to increased emissions, decreased fuel efficiency, and may trigger additional codes or issues within the vehicle's emissions system.

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