A no crank or no start condition may develop due to electronic lockup of the wireless control module (WCM), also referred to as the Sentry Key Remote Entry Module (SKREEM). When this module fails the remote keyless entry system will also not operate. The WCM is commonly replaced to correct this concern.Google+
Car Problem Reports
Jeep Liberty Engine Will not Start Due to Wireless Control Module Fault
Jeep Liberty Problem
Average Mileage: 78,360 mi (18,000 mi - 190,000 mi)
Sometimes when I try to start the car I put the key in and turn and nothing, try again and nothing. Try again and it starts. Doesn't happen all the time. Same thing happened at 30,000 miles and they replaced the skeem module for free. Had the car in the shop and it did it again when the service manager was present. Left the care for 2 days and they couldn't repeat the problem. Computer checked out as nothing wrong. Took it home started for 2 days fine, 3rd day same thing happened again. I think it's the skeem module again they think not. I'm confused.
Visitor, 2012 Jeep Liberty, 18,000 mi
Has no crank condition. Been to dealer 3 times & the problem continues.