I have a 200 Ficht on a Ranger that has been bullet proof, this weekend I have had my first problem. When I started motor to pull off trailer the check engine alarm sounded (continuous signal for about 1 minute then stops but check engine light stays on). The engine ran fine during all of this. Shut motor down, then re-started after a couple of minutes and had no alarm of light on for rest of the day until I trimmed the motor high to get through a shallow area. Shut motorr down again then re-started again and never had the alarm come back on. Anybody have any ideas or suggestions what might be happening? Will this show up if I hook a computer to the ECM?