IM GETTING A CODE 43 INTERMITATLY ON MY 93 2 DOOR YUKON , SPARK CONTROL CUIRCUIT , ANY SUGESTIONS ?

I believe there's an injector for each cylinder the throttle body only controls air and vacuum

code 43 knock sensor signal
54 Fuel pump circuit - voltage low Wiring open circuit/short circuit to ground, fuel pump relay, fuel pump, engine oil pressure warning lamp switch, ECM hope it helps

Just disconnect the negative battery cable for 5 Min's

Check your EGR valve; if this is gummed up, it could be the cause of your Jeep not wanting to run.

You may have a bad control module, this controls the injectors and fuel pump, also have you checked for spark,as sometimes you loose the spark also when module goes bad.

Code 12 = Recently disconnected battery

Code 14 = Coolant sensor high resistance or shorted

Code 43 = Knock sensor or Electronic spark control circuit fault

Code 55 End read code.

Hope helps (remember rated this).

Trouble code P0043 means: HO2S Heater Control Circuit Low (Bank 1, Sensor 3)Hex code 43 is for a misfire.

DTC 43 indicates a cylinder misfire, but does not specify which cylinder is misfiring. To pinpoint which cylinder is misfiring, you need a scan tool and get the "P" code, as you can see in the chart below. So it is quite possible you're barking up the wrong tree.


If you go to an Autozone they will scan the codes for you, if the CEL is currently on, and tell you the DTCs they find. That will get you closer to the problem.
I'm fairly confident that if you do a complete tune-up, spark plugs, spark plug wires, distributor cap and rotor, that the misfire codes will be taken care of. Be sure you read this, Dodge Ram 1500 Running Rough before replacing the spark plug wires, or if you have already replaced them.

Hope this help (remember comment and rated this)..

Im guessing the vehicle wont start? If so you shouldnt rule out fuel just because your getting fuel to the shrader valve, these vehicle require a certain amount of fuel pressure to run, im guessing around 60psi, so i would check fuel pressure, if ok keep in mind that these vehicles also had a problem with early failure on the fuel injectors, GM sells a new design injector set up for them.

CODE 43 IS ELECTRONIC SPARK CONTROL -.KNOCK SENSOR.LOOKS LIKE ALTERNATOR NOT PUTTING OUT ENOUGH VOLTS TO CHARGE BATTERY.YOU NEED 13.5 TO 14.5 VOLTS.CHECK ALTERNATOR FUSE AND ELECTRICAL WIRES.MAKE SURE BELTS NOT SLIPPING.IF ALL IS GOOD.REMOVE ALTERNATOR.LET AUTO ZONE CHECK IT.TO MAKE SURE.TURN OFF RADIO BEFORE MOVING BATTERY CABLES.SO YOU WONT LOSE RADIO CODE.YOUR CAR IS NOT GOING TO RUN RIGHT IF THE ECM DONT RECEIVE 12 VOLTS OR 13 VOLTS.

The code you are needing can be accessed online. just jump bmw.com