Having a problem with Jeep and wondered if you could give it some thought:
6AM Monday when i went to start my 2003 Grand Cherokee 4.7 the Sentry Key Immobiliser System Indicator light came on and car would not start. AA came and tried a few things but no luck. My spare key was at office and we agreed best to try that before towing to garage as that would tell whether key or car unit was the issue. Spare key tried yesterday and initially same issue. However after leaving key in car with ignition on for an hour the car seemed to recognise the key again and the car started!
Today the spare key initially gets the Sentry Key light and Malfunction light and the main key managed to start it. But not consistent and warning lights still on. Tried then with spare key works and all seems fine with no warning lights?! And finally it won't start with either key again
AA cleared all fault codes (OD26; 0210,0311,0811) most refer to communication with engine control. Today my local garage plugged in and only found P1687 - No Mech Instrument cluster BUS Message received.
I have also had "Check Gauges" fault intermittently coming on lately and even if it works next time I try, I fear an electrical fault that will recur and leave me stranded somewhere
Any ideas welcomed