B1202 Fuel sender circuit open
P1202 cylinder No. 2 Injector Circuit Open/Shorted
The fuel injector on cylinder two is at fault. It could simply have come unplugged, it could have an internal short, or it could have an internal failure that doesn't allow a signal through (open circuit). I'm guessing it has a miss since it would not be running on that cylinder. If you are familiar with a 'noid' light, you can use one to verify if the injector is getting a signal. This way, you know if there is an issue with the computer side of it or if the injector is at fault. A 'noid' light is basically a LED that you plug into the injector harness (after unplugging it from the fuel injector) and then run the engine to see if the light flashes. It should flash rapidly as it would come on each time the computer tells the fuel injector to fire. If it does light up as it should, replace the fuel injector. If it doesn't light up, you'll have to trace that wire back to the computer and use a continuity tester to see if a signal can get through the wire to the computer. If a signal doesn't get through, replace the wire. If a signal does get through the wire, replace the computer.
Mar 03, 2011 |
1999 Lincoln Navigator