How do I clear po449 code - Cars & Trucks

Replacing the vent solenoid will do the trick. If you replaced it, then any code reader will clear it. or after so many key on's , the code will clear. Depending on the vehicle, it could be 3 or up to 100.

Check your fuses, there may be a fuse that powers the vent solenoid. Check for a rubbed-through or chafed wiring harness. Check both wires to see if they are shorted to each other, to ground or power. Visually inspect the vent valve for cracks or damage. Trace the wires to and from the PCM/EMC/ECM and check for continuity continuity using a digital volt ohm meter (DVOM). If you have access to an advanced level scan tool, actuate the valve while reading power and ground at the connector or by simply using a bulb wired to both terminals, it will light up if power and ground are OK. Using a DVOM, check the resistance of the vent, in most cases the resistance reading should be low, refer to the manufacturer's specification or compare it to a new one. Too high or low a value indicates a faulty coil inside the valve, thusly meaning replacement is necessary