Re: 04 jeep grand cherokee security won't let me start jeep with spare key
There is in fact not a master key, both keys which normally come with the jeep are the same. Does the jeep not start anymore after the accident?
The key is of the transponder type and it is communicating with the SKIS system (Sentry Key Immobilizer System) via a loop antenna which is mounted around the ignition switch. Can it be that the antenna has moved due to the accident (rapid deceleration)? When the SKIS system doesn´t see a valid key, it will not send an ok signal to the PCM and the engine will start but shut down in a few seconds.
If the antenna is still in place, then you maybe need a new key. A new key has to be cut the same as your previous key, but the SKIS system also has to be programmed to recognize the new key.