Originally Posted by Billwill
Your mechanic should move into Sales....his talents are wasted where he is at the moment.
The trick of holding down the Odo meter trip button while switching on the ignition is merely to test that all the lamps illuminate and that the gauges are functional.......nothing more than that.
Lol pretty much yep. All that does, is do a self test of the instrument cluster, and on some chryslers at least, will display what software version the cluster is running. Apparently your mechanic is just that, a mechanic. Go seek an auto technician, as there is a difference. Mechanic=old days of throwing parts at a vehicle till its fixed. Technician=like a doctor on a vehicle, but we dont do trial and error like doctors do,lol.
Your engine light is supposed to come on when you turn the key on, and first start the vehicle, as a self test, then it should turn off. If it stays on, then there is a problem. Oil changes are not directly related to the engine light.
Now some vehicles, particularly GMs, but many others as well, have oil life monitors, and require reset after an oil change, and they are not tied to the engine light in any way.