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1994 Jeep Grand Cherokee Laredo 4dr

1994 Jeep Grand Cherokee
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September 13, 2012, 3:13 pm

MARK F
 

Question: IS THERE SOMETHING IM MISSING?? WILL ME VEHICLE STILL START IF I DIDNT REPLACE THE 02 SENSOR??

RAN A DIAGNOSTIC & CODES CAME BACK 02 SENSOR & MISS FIRE ON INJECTOR #4 CHANGED ALL 6 FUEL INJECTOR NOW VEHICLE WON'TSTART AT ALL


September 16, 2012, 9:55 pm

Ron W
Expert Mechanic

I believe there was an issue with the O2 senor heater circuit shorting out the computer ground. Which caused the vehicle not to start. Make sure the wiring is intact and not melted or frayed. If you unplug the O2, the vehicle should still start unless it is a wiring issue..


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