Having a "check-engine" light on all the time may seem like a minor inconvenience if you know the problem is merely a sensor, and that there is no need for a repair. But when you have to get e-tests every two years, and the light means a fail, or a re-test after a mechanic resets the code and verifies that it is a sensor, not a mechanical issue, this has now become a problem. When I had to replace the computer I had hoped it would recalibrate, and the problem would fix itself, but a faulty sensor is independent. I also have another faulty sensor in one door that reads it is ajar, which means I can't set the alarm without it going off continually.