My car is a 2012 Kia Sedona LX with 145 k miles – no oil consumption, very reliable, in very good shape. I bought it a year ago, a repossession by the bank, key chip function is disabled, driven 24 k miles without any trouble. Although a few weeks ago only one time it did not start. I cleaned the starter relay contacts and it was fine about 6 weeks. Then I drove about 10 miles to a meeting, parked it (it idled perfect for 30 sec. before I turned it off) and after 45 min. the car did not start I simply heard the solenoid click. After towing it home (I am a former mechanic and always repaired my cars) I replaced the starter after checking the relay, even bridging the start contacts. Still it did not start. Checking into it further I found that I could not turn over the engine. It seems to be seized. It does not add up for me nothing unusual before I had turned it off, full synthetic oil level with about 4500 miles, no noise or vibration.
Here is my question: What does the theft protection (IMS or IMP) do? Is there also a mechanical lock on the engine controlled by the electronic theft protection? Is it possible that in the process to void the key chip protection after the repossession the computer now remembers and blocks even the engine. Please let me know what you know even your opinion on the matter.