My Dodge Minivan is in very good shape, its been in my hands since new. It feels running perfectly, but yesterday it turned on the "engine light" in the cabin display and it has not turned off.
I tried checking wires in the engine, thightning the gasonile tank cap, changing to premium gas and putting in the gas tank some engine cleaner. I drove it for about 1/2 hour at high speed but it didn't work. The engine still feels working fine. What can be happening??

Thanks/Carlos

 

You need to determine what the "trouble codes" are either
from a OBD II scanner or using the "ignition key" method, turn
ignition On & Off three times and look at the odometer reading.

Do a search here using the trouble codes you find.

Also, Autozone no longer performs free OBD scans as repair shops
were complaining that they were losing money from the scanners
they purchased because Autozone was doing the diagnostics for free.
Autozone will tell you what the codes mean.

 

Like surfit had said you need to put codes out of the PCM. It maybe a evap code, is the ck engine lite flashing while driving or just stays on?

 

try disconnecting the battery for 60 seconds the connect it back that will reset it.