AutoCodes – Scion – P2420 2007 Scion xB

P2420 2007 Scion xB Code - Evaporative Emission System Switching Valve Control Circuit High

Quick Answer

When 5 hours have elapsed after the ignition switch is turned OFF, the electric vacuum pump creates negative pressure (vacuum) in Evaporative Emission (EVAP) 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: P2420 2007 Scion xB indicates Evaporative Emission System Switching Valve 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 2,238

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 Jan 11, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2420 2007 Scion xB Description

When 5 hours have elapsed after the ignition switch is turned OFF, the electric vacuum pump creates negative pressure (vacuum) in Evaporative Emission (EVAP) system. Then Engine Control Module (ECM) monitors for leaks and actuator malfunctions based on EVAP pressure. The ECM illuminates the MIL and sets a Diagnostic Trouble Code (DTC) if the difference in EVAP pressure in EVAP system pressure is small and does not increase more than 2.25 mmHg (0.3 kPa) within 10 seconds of changing the vent valve from OFF (vent) to ON (closed), the ECM determines that the vent valve is stuck OFF (vent).

OBDII Code P2420 2007 Scion xB - Evaporative Emission System Switching Valve Control Circuit High - AutoCodes.com — P2420 2007 Scion xB Code - Evaporative Emission System Switching Valve Control Circuit High

What does this mean?

What are the Possible Causes of the DTC P2420 2007 Scion xB?

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

How to Fix the DTC P2420 2007 Scion xB?

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 P2420 2007 Scion xB 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 P2420 2007 Scion xB 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 P2420 2007 Scion xB Code

1. What is the most common symptom of OBDII code P2420 on a 2007 Scion xB?

The most common symptom is the Check Engine light illuminating on the dashboard.

2. What does the OBDII code P2420 indicate on a 2007 Scion xB?

P2420 indicates a problem with the evaporative emission system switching valve control circuit being too high.

3. What are the possible causes of OBDII code P2420 on a 2007 Scion xB?

Possible causes include a faulty evaporative emission system switching valve, damaged wiring or connectors, or a malfunctioning engine control module.

4. How serious is OBDII code P2420 on a 2007 Scion xB?

While the code itself may not cause immediate drivability issues, it can affect the vehicle's emissions and fuel efficiency over time if left unresolved.

5. How can I diagnose OBDII code P2420 on my 2007 Scion xB?

Diagnosis involves using an OBDII scanner to retrieve the code, inspecting the switching valve and related components, and testing the wiring for continuity and proper voltage.

6. Can I still drive my 2007 Scion xB with OBDII code P2420?

It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to prevent any potential long-term problems.

7. How can I repair OBDII code P2420 on my 2007 Scion xB?

Repair options may include replacing the evaporative emission system switching valve, repairing or replacing damaged wiring, or resetting the engine control module.

8. Will OBDII code P2420 on a 2007 Scion xB cause the vehicle to fail an emissions test?

Yes, this code indicates a problem with the evaporative emission system, which can cause the vehicle to fail an emissions test.

9. How much does it typically cost to fix OBDII code P2420 on a 2007 Scion xB?

The cost of repair can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

10. How long does it take to repair OBDII code P2420 on a 2007 Scion xB?

The repair time can vary depending on the complexity of the issue and the availability of parts, but it typically takes a few hours to complete the necessary repairs.