I recently purchased a 2014 Grand Cherokee ecodiesel and shortly thereafter the dreaded engine light came on. Brought to dealer with just under 79000 miles. They replaced the cat under the 80000 mile warranty. Passed Ma. Inspection and so far so good. I drive short distance to work about 7 miles and have had to do the regeneration at about 100 miles . Is this normal. Have also heard the warranty has been extended to 10 years 120000 miles.