AutoCodes – Toyota – P2402 2004 Toyota Prius

P2402 2004 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 2004 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.

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Code Popularity 2,796

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
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Code P2402 2004 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 2004 Toyota Prius - EVAP System Leak Detection Pump Control Circuit High - AutoCodes.com — P2402 2004 Toyota Prius Code - EVAP System Leak Detection Pump Control Circuit High

What does this mean?

What are the Possible Causes of the DTC P2402 2004 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 2004 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 2004 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 2004 Toyota Prius code?

Need more information on how to fix the P2402 2004 Toyota Prius code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 2004 Toyota Prius Code

1. What are common symptoms of OBDII code P2402 in a 2004 Toyota Prius?

- Common symptoms include the check engine light illuminating, decreased fuel efficiency, and potential issues with emissions testing.

2. What does the OBDII code P2402 indicate in a 2004 Toyota Prius?

- OBDII code P2402 indicates a problem with the EVAP System Leak Detection Pump Control Circuit being too high in a 2004 Toyota Prius.

3. What are possible causes of OBDII code P2402 in a 2004 Toyota Prius?

- Possible causes include a faulty leak detection pump, damaged EVAP system components, loose or damaged wiring, or a malfunctioning control module.

4. How can I diagnose the cause of OBDII code P2402 in my 2004 Toyota Prius?

- Diagnosis may involve visually inspecting the EVAP system components, checking for loose connections or damaged wiring, and using a diagnostic scanner to pinpoint the issue.

5. Can I still drive my 2004 Toyota Prius with OBDII code P2402?

- It is generally safe to drive the vehicle with this code, but it is recommended to have the issue diagnosed and repaired as soon as possible to prevent further damage or emissions issues.

6. How can I repair OBDII code P2402 in my 2004 Toyota Prius?

- Repair may involve replacing the leak detection pump, repairing or replacing damaged wiring, fixing loose connections, or resetting the control module after addressing the issue.

7. Will OBDII code P2402 in a 2004 Toyota Prius affect fuel efficiency?

- Yes, this code may lead to decreased fuel efficiency due to potential issues with the EVAP system, which can impact the overall performance of the vehicle.

8. How much does it typically cost to repair OBDII code P2402 in a 2004 Toyota Prius?

- Repair costs can vary depending on the exact cause of the code, but it may range from $200 to $500 or more, including parts and labor.

9. Can I reset the check engine light after repairing OBDII code P2402 in my 2004 Toyota Prius?

- Yes, you can reset the check engine light using an OBDII scanner after repairing the issue and ensuring that the system has been properly fixed.

10. How often does OBDII code P2402 occur in a 2004 Toyota Prius?

- This code may occur infrequently, but if it does, it should be addressed promptly to maintain the proper functioning of the EVAP system in the vehicle.