AutoCodesToyota – P2420 2006 Toyota Camry

P2420 2006 Toyota Camry 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 Toyota Camry 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 3,706
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 Toyota Camry 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 Toyota Camry - Evaporative Emission System Switching Valve Control Circuit High - AutoCodes.com
P2420 2006 Toyota Camry Code - Evaporative Emission System Switching Valve Control Circuit High

What are the Possible Causes of the DTC P2420 2006 Toyota Camry?

  • 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 Toyota Camry?

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 Toyota Camry 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 Toyota Camry code?

Need more information on how to fix the P2420 2006 Toyota Camry code? Get Access to Factory Service Manuals

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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 Toyota Camry Code

1. What does the OBDII code P2420 mean on a 2006 Toyota Camry?

P2420 indicates a problem with the Evaporative Emission System Switching Valve Control Circuit, specifically that the circuit is experiencing a high voltage condition.

2. What are the common symptoms of code P2420 in a 2006 Toyota Camry?

Common symptoms include an illuminated check engine light, potential fuel odor near the vehicle, and possibly a failed emissions test.

3. What causes the P2420 code to appear on a 2006 Toyota Camry?

Causes may include a faulty switching valve, wiring issues like an open or short circuit, a malfunctioning ECM, or corroded electrical connectors.

4. How do I diagnose the P2420 code on my 2006 Toyota Camry?

Start by inspecting the wiring and connectors for damage or corrosion, then test the switching valve for proper operation and voltage levels, and finally check the ECM for faults.

5. Can a P2420 code cause drivability issues in my 2006 Toyota Camry?

Typically, it does not directly impact drivability but may lead to increased emissions and a failed emissions test.

6. How do I fix the P2420 code on a 2006 Toyota Camry?

Repairs may include replacing the evaporative switching valve, repairing or replacing damaged wiring or connectors, or, in rare cases, replacing the ECM.

7. Is it safe to drive with the P2420 code on my 2006 Toyota Camry?

While it’s generally safe to drive, prolonged operation with this code may lead to increased emissions and could prevent passing an emissions test.

8. How much does it cost to repair the P2420 code on a 2006 Toyota Camry?

Repair costs can vary, typically ranging from $100 to $300 depending on whether you need a new valve, wiring repairs, or professional diagnostics.

9. Can a loose gas cap cause the P2420 code on a 2006 Toyota Camry?

No, a loose gas cap is unlikely to trigger P2420. This code is specific to the switching valve control circuit.

10. Will clearing the P2420 code fix the problem on my 2006 Toyota Camry?

Clearing the code will reset the check engine light temporarily, but the underlying issue must be repaired to prevent the code from returning.

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