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
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.
OBD I code 67 - Neutral Drive Switch Circuit Open ( key on , engine off )
OBD code P1127 mean Exhaust not warm enough.
If the OBD-II code reader goes blank when plugged into the car, it could indicate a problem with the vehicle's OBD-II port, such as a blown fuse, loose connection, or lack of power supply. It may also suggest that the code reader itself is malfunctioning or not compatible with the vehicle. Additionally, some vehicles may require the ignition to be in the "on" position for the scanner to power up. Checking the connections and ensuring compatibility can help resolve the issue.
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.