most of these codes appear if the driver forgets to put the gas cap back on, or the gas cap seal is bad. double check the vacuum line from the throttle body to the purge solenoid for leaks. The best way is with a smoke machine. There could also be an issue with the purge solenoid or the electrical connection to it.
P0442 Evaporative Emission Control System Leak Detected (small leak)
In many cases the fuel cap is at fault, or a cracked vapor/vacuum hose.
There is a good chance your fuel cap is loose, missing or damaged. Check it and replace if necessary.
Trouble code P1444 means: Evaporative Emission System Purge Flow Sensor Circuit Low Input
P1443 Evaporative Emission Control System - Vacuum System - Purge Control Solenoid or Purge Control Valve fault Loose or defective gas cap will cause this code.
Trouble code P0440 means:Evaporative emission control system malfunction
If it is the valve on top of the fuel tank, it weel need to be replaced.
Code PO499 = Evaporative Emission System vent control circuit high. Problem can be a loose or defective gas cap, blocked gas vent, EVAP/Carbon canister purge valve fault, or loose, cracked, or broken vacuum hose.
P0443 - Evaporative Emission ( EVAP ) system fault - Chilton repair manual P0443 - EVAP Vapor Management Valve ( VMV ) circuit fault - Haynes repair manual P0443 - EVAP Control System Cannister Purge Valve Circuit Malfunction - DTC codes
P0441 Evaporative Emission Control System Incorrect Purge Flow I dont know what that means but that is the fault code. I have had this on my 03 Dodge Ram and it's usually the NVLD (Natural Valve Leak Detection) pump. Replace it and the error should clear or you may have to disconnect the battery to clear the code once you've replace the NVLD.
yes. It is only the fuel evaporative system detecting a leak or fault.
it means that a small leak has been detected in your evaporative system.