What the P0440 code means. P0440 is an OBD-II generic code that the engine control module (ECM) has detected a leak in the fuel tank vapor system or a vapor pressure sensor has malfunctioned.
Can I drive with a P0440 code?
The P0440 code is not an emergency code, as it doesn’t affect your ability to drive the vehicle safely. However, it may cause a dip in your fuel economy. If you’re nearing the time to take a new emissions test, the P0440 code will cause you to fail. Also, the vapors are flammable and dangerous to breathe.
What causes a P0440 code?
When code P0440 is set, a leak has been detected by the Engine Control Module (ECM), or a vapor pressure sensor has malfunctioned. The ECM determines this when the vehicle is turned off, and the vent control valve is commanded closed.
What does emission control system malfunction mean?
If your light is on, it typically means the car’s emissions control system is faulty, and the vehicle is polluting the air beyond allowable federal standards. A vehicle in this condition would fail an emissions inspection or smog check.
How do I fix code P0440?
What repairs can fix the P0440 code?
- Tightening or resetting the fuel cap.
- Replacing a leaking fuel cap that has a bad seal or vent in the cap.
- Repairing or replacing leaking vapor system components like a vapor control valve or carbon canister.
What code is P0449?
Code P0449 indicates that the evaporative control (EVAP) system vent valve solenoid is malfunctioning. This can be caused by either too little or too much electrical resistance or a mechanical problem with the vent valve itself.
Is it OK to drive with EVAP leak?
Yes, you are still safe to drive. The EVAP (Evaporated Emission Control System) is used to prevent gasoline vapors from escaping into the air from the fuel tank system to control greenhouse emissions.
Can an EVAP leak cause stalling?
Can Evap Leak Cause Car To Stall? Engine difficulty is another sign you should keep an eye out for when your EVAP canister is malfunctioning. It could result in your vehicle’s engine stall because of a vacuum leak inside your charcoal canister.
How do I turn my check engine light off?
Turning the Ignition On and Off
The on-off method is the equivalent fix for a vehicle’s check engine light. It forces the computer to refresh its saved state through a reboot. Simply place your key into the ignition and turn it on for 1-2 seconds, then turn it off for 1-2 seconds. Repeat this step three or four times.
Can I drive with emission light on?
So, is it safe to drive with the Emissions Control Light on? Yes, as long as it is the only light that has come on, you do not have to worry about your safety.
Can you drive with a malfunction indicator light on?
Avoid full-throttle acceleration and driving at high speed. You should also have the dealer inspect your car if this indicator comes on repeatedly, even though it may turn off as you continue driving. If you keep driving with the malfunction indicator lamp on, you can damage your car’s emissions controls and engine.