AutoCodes – Scion – P2420 2006 Scion xB

P2420 2006 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 2006 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 2,522
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jan 11, 2022
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Code P2420 2006 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 2006 Scion xB - Evaporative Emission System Switching Valve Control Circuit High - AutoCodes.com
P2420 2006 Scion xB Code - Evaporative Emission System Switching Valve Control Circuit High

What are the Possible Causes of the DTC P2420 2006 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 2006 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 2006 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 2006 Scion xB code?

Need more information on how to fix the P2420 2006 Scion xB 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 P2420 2006 Scion xB Code

1. What are the common symptoms of OBDII code P2420 in a 2006 Scion xB?

The common symptoms of code P2420 include the check engine light illuminating on the dashboard, decreased fuel efficiency, and potential issues with the vehicle's emissions system.

2. What causes the OBDII code P2420 in a 2006 Scion xB?

The most common cause of code P2420 in a 2006 Scion xB is a malfunction in the evaporative emission system switching valve control circuit, which can lead to high voltage levels being detected by the vehicle's onboard diagnostic system.

3. How serious is OBDII code P2420 in a 2006 Scion xB?

While code P2420 is not typically considered a critical issue that affects the immediate drivability of the vehicle, it can impact the vehicle's emissions output and fuel efficiency over time if left unresolved.

4. Can I continue driving my 2006 Scion xB with OBDII code P2420?

It is generally safe to continue driving your vehicle with code P2420, but it is recommended to address the underlying issue as soon as possible to prevent potential long-term damage to the emissions system.

5. How can I diagnose and repair OBDII code P2420 in a 2006 Scion xB?

Diagnosing and repairing code P2420 typically involves checking the wiring and connectors related to the evaporative emission system switching valve control circuit, testing the valve itself for proper operation, and clearing the code from the vehicle's computer after the repair is completed.

6. Can a faulty gas cap trigger OBDII code P2420 in a 2006 Scion xB?

While a faulty gas cap is not a common cause of code P2420, it is still recommended to ensure that the gas cap is properly sealed and functioning correctly before proceeding with further diagnostics.

7. How much does it cost to repair OBDII code P2420 in a 2006 Scion xB?

The cost of repairing code P2420 can vary depending on the underlying cause of the issue, but it typically ranges from $100 to $300 for parts and labor at a professional automotive repair shop.

8. Will resetting the check engine light resolve OBDII code P2420 in a 2006 Scion xB?

Simply resetting the check engine light without addressing the underlying issue that triggered code P2420 will not resolve the problem. It is important to diagnose and repair the root cause of the code to prevent it from reoccurring.

9. Can a DIY enthusiast fix OBDII code P2420 in a 2006 Scion xB?

Depending on their level of automotive knowledge and experience, a DIY enthusiast may be able to diagnose and repair code P2420 by following the vehicle's service manual or using specialized diagnostic tools. However, for those less experienced, seeking professional help is recommended.

10. How often does OBDII code P2420 occur in a 2006 Scion xB?

While code P2420 is not one of the most common OBDII codes in a 2006 Scion xB, it can still occur due to various factors such as age, mileage, and maintenance history of the vehicle's emissions system. Regular maintenance and inspections can help prevent this code from appearing.

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