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Engine-Codes – Scion – P2420 2007 Scion xB

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

Quick Answer

The P2420 diagnostic trouble code (DTC) for a 2007 Scion xB indicates a problem with the evaporative emission system switching valve control circuit being too high. Common causes include Faulty evaporative emission system switching valve, Corroded or damaged wiring in the control circuit, Loose or disconnected electrical connectors. 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 evaporative emission system switching valve, Corroded or damaged wiring in the control circuit, Loose or disconnected electrical connectors.
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 14, 2024
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Code P2420 2007 Scion xB Description

The P2420 diagnostic trouble code (DTC) for a 2007 Scion xB indicates a problem with the evaporative emission system switching valve control circuit being too high. The evaporative emission system is responsible for capturing and storing fuel vapors to prevent them from being released into the atmosphere. The switching valve controls the flow of vapors between the fuel tank and the charcoal canister, which is a key component of the system.

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

Common Causes of P2420 2007 Scion xB

  1. Faulty evaporative emission system switching valve.
  2. Corroded or damaged wiring in the control circuit.
  3. Loose or disconnected electrical connectors.
  4. Issues with the engine control module (ECM) or powertrain control module (PCM).
  5. Fuel cap not properly sealed, causing a leak in the system.

Symptoms of P2420 2007 Scion xB

  1. Check engine light illuminated on the dashboard.
  2. Decreased fuel efficiency.
  3. Strong fuel odor coming from the vehicle.
  4. Rough idling or stalling when at a stop.
  5. Failed emissions test due to increased emissions.

How to Fix P2420 2007 Scion xB

  1. Begin by inspecting the wiring and connectors in the control circuit for any damage or corrosion. Repair or replace as needed.
  2. Test the evaporative emission system switching valve to ensure it is functioning properly. Replace if faulty.
  3. Clear the DTC using an OBD-II scanner and drive the vehicle to see if the code returns.
  4. If the code persists, check the ECM or PCM for any malfunctions and repair or replace as necessary.
  5. Finally, ensure that the fuel cap is properly sealed to prevent any leaks in the system.

Cost to Fix P2420 2007 Scion xB

The typical repair costs for addressing a P2420 code on a 2007 Scion xB can range from $150 to $400, depending on the specific cause of the issue and the cost of parts and labor. It is important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging between $80 and $150. Rates may be higher at dealerships or in metropolitan areas, while independent shops may charge less. For a more precise estimate, it is recommended to check with local auto repair shops.

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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.

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