The engine may be hard to start and/or illuminate the Check Engine Light with code P0340/P0344 stored. The common repair is to update the Powertrain Control Module (PCM) software. In some cases replacement of the camshaft position sensor may also be required.
Car Problem Reports
Jeep Commander Hard Starting and/or PCM Codes P0340/P0344
Jeep Commander Problem
Average Mileage: 56,666 mi (40,000 mi - 71,000 mi)
Visitor, 2006 Jeep Commander, 59,000 mi
Code p0340, hard starting and failure to quickly accelerate
I was having trouble with my truck when it got up around 4500 rpms and the truck would jerk around and then basically stop. After restarting it i went to an auto store where they told me it was the cam position sensor. I changed that and am still having the problem. I need some help if anyone has it.