Is that the Check Engine Light? maybe it's coming on due to
mileage, they do that periodically at preset mileage intervals
Wild
Yes, the sensor light is what the early check engine lights were called/named.
If it was coming on because of mileage it would stay on....it wouldn't come on for awhile, then go off, then come back on again.
fordguy....is the sensor light wired up to the check engine light wire in the 16V harness? If it is, have you tried checking codes to see if any show up?