Hi, everyone. Recently, I noticed our 2009 Dodge Journey(6cyl.) will jolt sometimes when shifting from reverse to drive. Also, a couple of days ago, the check engine light came on. I took it to Autozone today to have the code read and came up with a PO660 code. The printout reads; Definition: manifold tune solenoid circuit condition. Explanation: dual plane solenoid failure. Probable cause: 1) shorted or open tuning solenoid 2) electrical problem. My questions are: would it feasible for me to locate and test this solenoid and wiring myself with a multi-tester? Or, would it be better left to the dealer diagnose and repair the problem?