DOES ANY ONE OUT THERE HAVE AN IDEA AS TO WHY THE RED ENGINE LITE WOULD COME ON WHEN JUST STARTING THE ENGINE? iT DOES NOT MATTER THAT IVE DISCONNECTED THE BATTERY FOR A DAY AND THEN RECONNECTED IT AGAIN.(MY MECHANIC SUGGESTED THAT THE TRUCK MIGHT HAVE A RESET BY DISCONNECTING...IT DOESNT) iT DOES SEEM TO BE ELECTRICAL BECAUSE IT LITES AS SOON AS I TURN THE KEY. THE LITE STAYS ON WHETHER THE TRUCK IS WARMED UP OR NOT. PLEASE HELP ME . THANKS FOR ANY INFO!

 

Well all cars do a diagnostic check where it should light up for a few seconds and then turn off. Will need to know if your truck is fuel injected or carbureted to look into it further.