Cooling Fan output circuit fault
On some vehicles it may double for glow plug out put circuit fault
Check fan relay in in place
Check that fan runs correct, some vehicles the computer can tell if the fan does not start and run correct.
What does obd code P0740 mean
plug a obd 2 code reader into your car and activate it.
OBD I, but for the most part, you can use OBD II
OBD code P0304 is Cylinder Four Misfire.
Obd-on board diagnostic. The port is the plug the scan tool or code reader connects to.
J1850 is not a trouble code. It is a protocol that the OBD-II system uses. Trouble codes will be represented by a P before the numbers
OBD I code 67 - Neutral Drive Switch Circuit Open ( key on , engine off )
OBD code P1127 mean Exhaust not warm enough.
Cylinder #1 misfire.
What does a code 212 mean on a OBD 1 mustang
There is an OBD I plug somewhere on the vehicle.
OBD-1. 1995 was a changeover year. All 1995 cars/trucks (GM to my knowledge, I don't know about the other brands) were OBD-1 and some have an OBD-2 connector, but still are OBD-1.