Well, I have had a strange 2 weeks with my PAC. First I got an Service Engine Soon icon and with help from my mechanic we found out that it was the gas cap. Bought a new one and error went away. Then yesterday the check engine icon reappeared and I will have to go back to my mechanic's scanner to find out the latest news. Of course my TPMS has been wacko from day one and I have had a constant Service Tire System Soon message displayed. Then today for some reason the message went away and my Compass worked. Yeah! For about an hour...then the TPMS error came back. Frustrating.