P2420 Code - Evaporative Emission System Switching Valve Control Circuit High
Quick Answer
The P2420 code indicates a problem with the evaporative emission system switching valve control circuit being stuck in the high position. Common causes include Faulty evaporative emission system switching valve, Wiring or connector issues in the control circuit, Corrosion or damage to the valve. 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 indicates Evaporative Emission System Switching Valve Control Circuit High.
- Common causes
- Common causes include Faulty evaporative emission system switching valve, Wiring or connector issues in the control circuit, Corrosion or damage to the valve.
- 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 P2420 Description
The P2420 code indicates a problem with the evaporative emission system switching valve control circuit being stuck in the high position. This valve is responsible for controlling the flow of fuel vapors from the fuel tank to the engine intake manifold. When the valve is stuck open, it can lead to an imbalance in the fuel-air mixture, affecting the vehicle's performance and emissions. If not addressed, this issue can result in decreased fuel efficiency, increased emissions, and potential damage to other components of the emission system.
Common Causes of P2420
- Faulty evaporative emission system switching valve
- Wiring or connector issues in the control circuit
- Corrosion or damage to the valve
- Vacuum leaks in the system
- PCM (Powertrain Control Module) failure
Symptoms of P2420
- Check Engine Light is illuminated
- Decreased fuel efficiency
- Rough idling or stalling
- Strong fuel odor
- Failed emissions test
How to Fix P2420
- Use a scan tool to diagnose the specific issue with the evaporative emission system switching valve control circuit.
- Inspect the wiring and connectors for any damage or corrosion, repair or replace as needed.
- Test the evaporative emission system switching valve for proper operation, replace if faulty.
- Clear the diagnostic trouble codes and test drive the vehicle to ensure the issue is resolved.
- If the problem persists, further diagnostic testing may be required to pinpoint the exact cause of the high circuit voltage.
Cost to Fix P2420
The typical repair costs for addressing a P2420 code can range from $150 to $500, depending on the extent of the issue and the cost of parts. This estimate includes the cost of parts such as the switching valve, wiring, and connectors, as well as labor costs. However, it's important to note that these costs can vary based on location, vehicle make and model, and the specific repair shop. It's recommended to obtain quotes from different shops to compare prices and ensure a competitive rate.
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Code P2420 Information for Specific Makes
- P2420 Dodge — Evaporative Emission System Switching Valve Control Circuit High
- P2420 Hyundai — DMTL Valve Short To Battery Voltage
- P2420 KIA — DMTL Valve Short To Battery Voltage
- P2420 Lexus — Evaporative Emission System Switching Valve Control Circuit High
- P2420 Scion — Evaporative Emission System Switching Valve Control Circuit High
- P2420 Toyota — Evaporative Emission System Switching Valve Control Circuit High
- P2420 Volvo — Leak Diagnostic Unit Valve Signal Too High
Frequently Asked Questions about P2420 Code
No Frequently Asked Questions about P2420 Code found.
Discuss the causes and fixes for P2420 OBDII Code
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Engine lights came on. I took it to Autozone to plug in the code reader. It notes P2320 Evap system switching valve control circuit high. Not sure what that means. Not sure if it's critical that I should not be driving my RX400h. Lexus just replace a completely new dash board for me over the weekend. Is that a problem?
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The problem with the EVAP system will not cause any engine performance problems, but will cause your vehicle to fail the smog test.
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