P2420 Dodge Code - Evaporative Emission System Switching Valve Control Circuit High
Quick Answer
5 hours after the ignition switch is turned OFF, the electric vacuum pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) 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 Dodge 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 Dodge Description
What are the Possible Causes of the DTC P2420 Dodge?
- 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 Dodge?
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 Dodge 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.
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Frequently Asked Questions about P2420 Dodge Code
1. What does the OBDII code P2420 mean for a Dodge vehicle?
P2420 indicates an issue with the Evaporative Emission System (EVAP) Switching Valve Control Circuit, specifically a high voltage condition.
2. What are common symptoms of the P2420 code on a Dodge?
Common symptoms include the Check Engine Light turning on, potential fuel odor near the vehicle, and possible difficulty passing emissions tests.
3. What causes the P2420 code to appear?
Possible causes include a faulty EVAP switching valve, damaged wiring or connectors in the control circuit, or a malfunctioning powertrain control module (PCM).
4. Can I drive my Dodge with the P2420 code active?
While the vehicle may still be drivable, addressing the issue promptly is recommended to prevent potential emissions system damage and ensure compliance with regulations.
5. How do I diagnose the P2420 code on a Dodge?
Diagnosis typically involves checking the EVAP switching valve for proper operation, inspecting related wiring and connectors for damage, and testing the control circuit voltage.
6. How can I fix the P2420 code on a Dodge?
Repairs may include replacing the EVAP switching valve, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the PCM if necessary.
7. How much does it cost to fix the P2420 code on a Dodge?
Repairs can cost between $100 and $500, depending on whether you need to replace the EVAP switching valve, repair wiring, or replace the PCM.
8. Can a loose gas cap cause the P2420 code?
A loose gas cap is unlikely to cause this specific code, but it can trigger other EVAP-related codes. Always check the gas cap as part of routine diagnostics.
9. Can a bad PCM trigger the P2420 code on a Dodge?
Yes, a malfunctioning PCM can cause this code, but it is less common. Diagnosing other components first is recommended.
10. Does the P2420 code affect fuel efficiency on a Dodge?
Typically, this code does not directly affect fuel efficiency, but unresolved EVAP system issues can lead to fuel vapor loss over time.
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