I have a 2012 Jeep Liberty (3.7L V6) that is experiencing a no-start issue, though a scan at AutoZone showed no active fault codes and the dashboard temperature gauge always stays right in the middle without overheating. Before replacing the internal TIPM power relays (K1/K2), the engine would shake and stall at red lights or when slowing down, requiring a couple of attempts to restart while shaking. Replacing those relays completely resolved the stalling while driving, but now after making multiple short delivery stops where the car is turned off and restarted, it randomly refuses to start back up. During this failure state, the starter cranks and the engine shakes as if it wants to catch, but it won't run until it sits turned off for 10 to 30 minutes.
Sep 24, 2026 at 9:23 PM
