20 Most Recent 2007 Jeep Grand Cherokee Overland - Page 4 Questions & Answers

google it or better get the FSM for your car, and read how to do the tests, that prove what causes each DTC. 505 idle speed failure. 351 http://www.obd-codes.com/p0351 there are 5 engines, so first find that out,. 351 ignition Coil # 1 Primary Circuit Peak primary circuit current not achieved with maximum dwell time. this means the coil primary is open (other books show the fail is for too low current (open coil in COP) 505 Engine started; system voltage over 11.5v and the PCM detected an unexpected voltage condition on one or more of the IAC motor circuits for 2.75 seconds with the IAC motor active. id fix the 351, cop coil , its probably bad, or bad connections to it. then clean the iSC, then reset all codes, with a scan tool drive 20 miles or until CEL glows, driving and the rescan.

have them check the fuel injectors and comprission test the engine ask the genral mgr what kinda techs he has that cant find a mis fire

The factory remote start system is designed to not function
when ever a check engie light is illuminated. The issue would have to be diagnosed by dealer and repaired. The remote starter should work again after repairs.

no it could be window switch or window motor

P0471 - Exhaust Pressure Sensor Range/Performance
I can't say for certain but the code suggests - something is restricting your exhaust or you have an exhaust leak. I would have to have more info for a possible better solution.

You will need the problem diagnosed by a qualifed techinican with special equipment.

have the fault codes read and replace the faulty units. Ask the service person if they pressure cleaned the engine as that quite often causes problems with water getting into the connections and shorting out