P2420 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 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.
Code P2420 Description
What are the Possible Causes of the DTC P2420?
- 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?
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 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 code?
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Need Help with the Code?
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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
-
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?
-
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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