AutoCodes – Scion – P2420 2005 Scion xB

P2420 2005 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 2005 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 2,247
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 2005 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 2005 Scion xB - Evaporative Emission System Switching Valve Control Circuit High - AutoCodes.com
P2420 2005 Scion xB Code - Evaporative Emission System Switching Valve Control Circuit High

What are the Possible Causes of the DTC P2420 2005 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 2005 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 2005 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 2005 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 2005 Scion xB Code

1. What are the common symptoms of OBDII code P2420 in a 2005 Scion xB?

The common symptoms of code P2420 in a 2005 Scion xB can include the check engine light coming on, rough idling, decreased fuel efficiency, and potential difficulty starting the vehicle.

2. What can cause the OBDII code P2420 in a 2005 Scion xB?

The code P2420 in a 2005 Scion xB is typically caused by a malfunction in the evaporative emission system switching valve control circuit, which can be triggered by a faulty valve, wiring issues, or a defective control module.

3. How serious is OBDII code P2420 in a 2005 Scion xB?

While the symptoms of code P2420 may not always be severe, it is important to address this issue promptly to prevent potential damage to the vehicle's emission control system and ensure optimal performance.

4. Can I continue driving my 2005 Scion xB with OBDII code P2420?

It is generally not recommended to continue driving your 2005 Scion xB with an active OBDII code like P2420, as it can lead to increased emissions, reduced fuel efficiency, and potential long-term damage to the vehicle's engine components.

5. How can I diagnose and repair OBDII code P2420 in my 2005 Scion xB?

Diagnosing and repairing code P2420 in a 2005 Scion xB typically involves checking the switching valve, inspecting the wiring for any damage, and testing the control module. It is recommended to consult a professional mechanic for proper diagnosis and repair.

6. Is it possible to reset OBDII code P2420 in a 2005 Scion xB without fixing the issue?

While you can clear the code with an OBDII scanner, the check engine light is likely to reappear if the underlying issue triggering code P2420 is not addressed. It is best to fix the problem to prevent ongoing issues.

7. How much does it cost to fix OBDII code P2420 in a 2005 Scion xB?

The cost of fixing code P2420 in a 2005 Scion xB can vary depending on the specific cause of the issue, the parts needed for repair, and the labor rates of the repair shop. It is advisable to obtain quotes from multiple mechanics for an accurate estimate.

8. Can a DIY enthusiast repair OBDII code P2420 in a 2005 Scion xB?

While some DIY enthusiasts may have the skills to diagnose and repair code P2420 in a 2005 Scion xB, it is a complex issue that may require specialized tools and expertise. Consulting a professional mechanic is recommended for proper diagnosis and repair.

9. Will fixing OBDII code P2420 improve the performance of my 2005 Scion xB?

Addressing and repairing code P2420 in a 2005 Scion xB can improve the vehicle's performance by ensuring proper emission control and fuel efficiency. It is essential to resolve the issue promptly to maintain optimal engine operation.

10. How often does OBDII code P2420 occur in a 2005 Scion xB?

While the occurrence of code P2420 can vary from vehicle to vehicle, it is not a common issue in a 2005 Scion xB. However, if the code does appear, it should be addressed promptly to avoid potential complications.

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