P0448
EVAP System Vent Control Circuit Shorted
P0448 is an OBD-II diagnostic trouble code meaning: EVAP System Vent Control Circuit Shorted. Common causes: damage to the wiring harness to the purge valve, short circuit in the purge valve itself. Estimated repair cost: $33–167.
Symptoms
- Check Engine Light Is On
- Unstable engine operation at idle
- Increased fuel consumption
- Dips during acceleration
Causes
- Damage to the wiring harness to the purge valve
- Short circuit in the purge valve itself
- Engine control unit malfunction
- Corrosion of electrical contacts
- Open or short to ground in the control circuit
How to Fix
- Check the condition of the wiring harness to the purge valve for damage.
- Check the resistance of the purge valve (should be within 20-30 Ohms)
- Check power supply and control signal to the valve
- If necessary, replace the purge valve or repair the wiring harness
- Clear error codes and check if the error appears again
Related codes
Error P0448 by Vehicle Brand
FAQ
What does the P0448 code mean?
P0448 is an OBD-II diagnostic trouble code that indicates: EVAP System Vent Control Circuit Shorted
What causes a P0448 error code?
The most common causes of P0448 include: Damage to the wiring harness to the purge valve; Short circuit in the purge valve itself; Engine control unit malfunction; Corrosion of electrical contacts.
How do I fix a P0448 diagnostic trouble code?
To fix P0448: Check the condition of the wiring harness to the purge valve for damage.. Check the resistance of the purge valve (should be within 20-30 Ohms). Check power supply and control signal to the valve. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0448?
Limited driving only, diagnose soon
How much does it cost to fix P0448?
The estimated repair cost for P0448 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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