I have a 2007 dodge caliber with the 2.4L 4 cyl motor. It is idling at aroung 1500 rpm. it has around 66k on it. I scanned the codes and it came up with the 445 and 446. Should i replace the canister purge valve or be looking into the wiring harness to it? Where is it located exactly?

 

I would start with the gas cap. This is usually 99% of the 445 code. It doesn't seal properly ad causes the massive pressure loss code.

A code P0446 could mean one or more of the following has happened:

* Faulty vent valve
* Open, short or excessive resistance on Vent valve control circuit
* Blockage of vent valve
* Bad PCM

I would replace the gas cap first, reset the codes and see what happens. It's the cheapest route.

 

We have replaced the gas cap about 6 months ago when we got an evap code for a small leak. Codes were erased and haven't came back on since. This came on Friday. I don't understand why it would make the vehicle idle high

 

Not sure either, unless there is enough extra air being drawn in to cause the high idle.

 

Where is the purge valve located at on this motor

 

I believe that the valve is at the canister near the fuel tank.
Download this free service manual and it will be quite helpful.

http://www.mediafire.com/?4d7adjtcyzdrcez

It is legit, it was uploaded by a former admin here.