P2421
EVAP System Vent Valve Stuck Open
P2421 is an OBD-II diagnostic trouble code meaning: EVAP System Vent Valve Stuck Open. Common causes: stuck evap vent valve, open or short circuit in valve circuit. Estimated repair cost: $17–56.
Symptoms
- Check Engine Light Is On
- Increased fuel consumption
- Smell of gasoline in the fuel tank area
- Unstable engine idling
- Dips during acceleration
Causes
- Stuck EVAP vent valve
- Open or short circuit in valve circuit
- Damaged wiring harness
- Engine control unit malfunction
- Mechanical damage to the valve
How to Fix
- Check the condition of the EVAP vent valve
- Test the valve electrical circuit
- Check valve coil resistance
- Replace faulty valve if necessary
- Clear error codes and check the system
Related codes
Error P2421 by Vehicle Brand
FAQ
What does the P2421 code mean?
P2421 is an OBD-II diagnostic trouble code that indicates: EVAP System Vent Valve Stuck Open
What causes a P2421 error code?
The most common causes of P2421 include: Stuck EVAP vent valve; Open or short circuit in valve circuit; Damaged wiring harness; Engine control unit malfunction.
How do I fix a P2421 diagnostic trouble code?
To fix P2421: Check the condition of the EVAP vent valve. Test the valve electrical circuit. Check valve coil resistance. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2421?
Yes, but get it checked soon
How much does it cost to fix P2421?
The estimated repair cost for P2421 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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