P0448: EVAP system vent control circuit shorted
You can keep driving. Get it checked when convenient.
Can I drive with P0448?
Yes, you can keep driving. Vent valve circuit shorted; no impact on vehicle safety or engine performance.
What does P0448 mean?
P0448 stands for Evaporative Emission Control System Vent Control Circuit Shorted.
Symptoms you may notice
- Steady check engine light with minimal drivability symptoms
- Normal engine power, idle, and acceleration
- Possible faint gasoline vapor smell near gas cap
How much does it cost to fix?
Repair costs for code P0448 depend on the specific underlying root cause, ranging from simple DIY checks to component replacement. The table below lists the most common causes and rough price ranges in USD:
- Internal short in the vent valve solenoid
- Wiring pinched between frame rail and fuel tank
- Water logged connector
- Blown system fuse
What to do next
- Inspect rear frame wiring for pinching or rubbing against the fuel tank strap.
- Unplug the vent valve and test resistance.
- Replace the vent valve assembly.
Last updated: October 2026
Related codes
General guidance only, not a professional diagnosis. If the check-engine light is flashing, or the car is running rough, overheating or losing power, stop driving and get help.
About this code
Code P0448 indicates excessive electrical current on the vent valve circuit. The engine computer disables the circuit to prevent internal board damage. The car is safe to drive for a short time, but get it checked, without risk of stalling or engine damage.