Nissan Maxima OBD1 Codes

Engine Performance Problem 1994 Nissan Maxima 6 Cyl Front Wheel Drive Automatic I Have A 94 Maxima The Intermitently Runs Rough And...

Have A Code 12 Changed Mass Air Flow Sensor Cleared Code After Installing New One Started Car ,ran For About For Short Amount Of Time Died...

The Odometer And Speedometer Do Not Work. The Tachometer Shows It Idle At 4,000 But Idle Is Fine. This Is How I Got The Car, Not Much Of Its...

I Understand Both Codes I Got From My Ecm But Which Of The Two Should I Check? Is There Any Chance That My Only Problem Could Be The O2...