One way to fix P0499 trouble code in a Dodge 2004 Ram is to check the gas tank cap and make sure it is neither too loose or too tight. The P0499 means something is wrong with the evap system.
Trouble code P0499 means: Evaporative Emission System Vent Control Circuit High
Trouble code P0513 means:Incorrect immobilizer key
Trouble code P0441 means:Evaporative emission control system incorrect purge flow
Trouble code P0441 means:Evaporative emission control system incorrect purge flow
Trouble code P0135 means:O2 sensor heater circuit malfunction (Bank 1 Sensor 1)
P0499 Evaporative Emission System Vent Control Circuit High
Trouble code P0441 means: EVAP Purge Flow Monitor Fault
Trouble code P0301 means: Cylinder 1 Misfire Detected
Trouble code P0440 means:Evaporative emission control system malfunction
Trouble code P0335 means: Crankshaft Position Sensor Circuit
Trouble code P0572 means: Brake Switch A Circuit Low
Trouble code P0440 means:Evaporative emission control system malfunction