AutoCodes – Scion – P2402 Scion

P2402 Scion Code - Evaporative Emission Leak Detection Pump Stuck ON

Quick Answer

5 hours after the ignition switch is turned off, the leak detection pump creates negative pressure (vacuum) in the Evaporative Emission (EVAP) system. Common causes include Faulty Canister Pump Module, Canister Pump Module harness is open or shorted, Canister 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 Scion indicates Evaporative Emission Leak Detection Pump Stuck ON.
Common causes: Common causes include Faulty Canister Pump Module, Canister Pump Module harness is open or shorted, Canister 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 10,331

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 Mar 26, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2402 Scion Description

5 hours after the ignition switch is turned off, the leak detection pump creates negative pressure (vacuum) in the Evaporative Emission (EVAP) system. The Engine Control Module (ECM) monitors for leaks and actuator malfunctions based on the EVAP pressure. The leak detection pump creates negative pressure through the reference orifice. When the system is normal, the EVAP pressure is between 97 to 100 kPa(abs) [726 to 750 mmHg(abs) (Typical value)] and saturated within a minute. If not, the ECM interprets this as a malfunction. The ECM illuminates the MIL and stores a Diagnostic Trouble Code (DTC) if this malfunction is detected in consecutive drive cycles. The Canister Pump Module is attached to the EVAP Canister and contains the Canister Pressure Sensor, the Leak Detection Pump, and the Vent Valve.

OBDII Code P2402 Scion - Evaporative Emission Leak Detection Pump Stuck ON - AutoCodes.com — P2402 Scion Code - Evaporative Emission Leak Detection Pump Stuck ON

What does this mean?

What are the Possible Causes of the DTC P2402 Scion?

Faulty Canister Pump Module
Canister Pump Module harness is open or shorted
Canister Pump Module circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2402 Scion?

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 Scion 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 Scion code?

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

Need Help with the Code?

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Information for Specific Scion Models

P2402 2005 Scion xB — Leak Detection Pump Stuck ON
P2402 2006 Scion xB — Leak Detection Pump Stuck ON
P2402 2007 Scion xB — Leak Detection Pump Stuck ON

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 Scion Code

What does the OBDII code P2402 mean on a Scion?

P2402 indicates that the Evaporative Emission Leak Detection Pump is stuck in the "ON" position, which means the ECU has detected a malfunction in the EVAP system's leak detection process.

What are the common symptoms of code P2402 in a Scion?

Symptoms may include an illuminated check engine light, reduced fuel efficiency, a noticeable fuel smell, or failed emissions testing.

What causes the P2402 code to appear?

Common causes include a faulty leak detection pump, damaged wiring or connectors, a malfunctioning EVAP system pressure sensor, or issues with the ECU.

Can I drive my Scion with the P2402 code?

While the vehicle may still be drivable, ignoring the code can lead to increased emissions, possible fuel vapor leaks, and complications during emissions testing.

How do I diagnose the P2402 code in my Scion?

Start by inspecting the leak detection pump, EVAP system wiring, and connectors for damage. Use a scan tool to check for related codes and perform an EVAP system pressure test if necessary.

How do I fix the P2402 code on my Scion?

Repairs may involve replacing the leak detection pump, repairing or replacing damaged wiring and connectors, or addressing any ECU-related issues.

How much does it cost to fix the P2402 code?

Repair costs vary but typically range between $200 and $600, depending on whether the leak detection pump needs replacement and labor rates in your area.

Can a loose gas cap cause the P2402 code?

While a loose gas cap can trigger other EVAP codes, it is unlikely to cause P2402, which specifically deals with the leak detection pump.

Is the P2402 code covered under warranty for my Scion?

Coverage depends on your vehicle's age, mileage, and warranty terms. The EVAP system may be covered under an extended emissions warranty, so check with your dealer.

What tools are needed to fix the P2402 code?

Youâ€™ll typically need a scan tool, a multimeter for electrical testing, and possibly a smoke machine to check for leaks in the EVAP system.