AutoCodes – Toyota – P2402 2009 Toyota Prius

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

Quick Answer

5 hours after the ignition switch is turned OFF, the electric vacuum pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. Common causes include Faulty Vacuum Pump Module, Vacuum Pump Module harness is open or shorted, Vacuum Pump Module circuit poor electrical connection. 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 Vacuum Pump Module, Vacuum Pump Module harness is open or shorted, Vacuum Pump Module circuit poor electrical connection.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 3,918

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 04, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P2402 2009 Toyota Prius Description

5 hours after the ignition switch is turned OFF, the electric vacuum pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The Engine Control Module (ECM) monitors for leaks and actuator malfunctions based on the EVAP pressure. To determine the leak criterion (Reference pressure), a vacuum pump creates negative pressure in the canister pump module through 0.02 inch orifice and pressure is measured. If the conditions are not met, the Engine Control Module the code will be set.

OBDII Code P2402 2009 Toyota Prius - EVAP System Leak Detection Pump Control Circuit High - AutoCodes.com — P2402 2009 Toyota Prius Code - EVAP System Leak Detection Pump Control Circuit High

What does this mean?

What are the Possible Causes of the DTC P2402 2009 Toyota Prius?

Faulty Vacuum Pump Module
Vacuum Pump Module harness is open or shorted
Vacuum Pump Module circuit poor electrical connection
EVAP system hose (clogged, cracked or broken)
Faulty Engine Control Module (ECM)

How to Fix the DTC P2402 2009 Toyota Prius?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2402 2009 Toyota Prius code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P2402 2009 Toyota Prius code?

Need more information on how to fix the P2402 2009 Toyota Prius code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2402 2009 Toyota Prius code diagnosed by a professional: Find a repair shop in your area

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.