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Try the ignition control module... QDM stands for quad driver module which is apart of ignition control module. This module is located on top of the engine under the coil cover. Where the wires plug-in, this is the module.
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Check all your grounds to the battery and alternated. Check all the powers also. Make sure your getting a good connection everywhere. Make sure nothing is corroded.
Code 54 is for a problem with the heater circuit for the O2 sensor that is mounted after the catalytic converter. The problem could be the sensor or the wiring for the heater circuit in the sensor. The circuit would need to be tested.
The code P0153 is for O2 sensor with slow responce on bank 21. This will not make your car idle fast. You have either an IAC problem or unmetered air. You should take your car to the dealership. They can pin point the fault and tell you exactly what is wrong with your car. Then the dealership can stand behind thier repair. There are many things that can cause your car to idle fast. So before you waste your time and money on people's guess... just pay to have it diagnosed by a profesional. (dealership)
Try the ignition control module... QDM stands for quad driver module which is apart of ignition control module. This module is located on top of the engine under the coil cover. Where the wires plug-in, this is the module.
Sometimes this is caused buy a vacuum problem. It is not opening the door to let your air in at a slow speed. The doors are opening at high speed due to the air pressure from the outside air. Make sure that the fan is runnig by turning your ignition on but not starting the engine. Turn the fan on high and see if you can hear it. If the fan is running then take you car to a mechanic you trust and have them check the vacuum going to the door.
Your car is flashing a fault code, Slow flashes are tens, fast flashes are ones. You need to count the flashes ( fast and slow ) , work out the code number then ring your dealership and ask nicely what the code signifies. You may need to get your car plugged in to the dealer computer to reset it after the fault is fixed. Good luck Marshall
Sounds like your oil ran low and the pistons and rods are runnig without oil. This will seize the engine check your oil if it is real low put some oil in it and try to start it. If it starts you got lucky. Tahn find out how you lost all your oil before runnig it to much. If the engine doen't turn over than your motor is no good.
Tightened the gas cap. Emisions testing left it slightly loose setting off the sensor warnings. Even if it doesn't "look" like it is ose take it off and put it back on tight. If the warnings are still flashing then it prob is the sensor. Caddy's are very touchy about their gas caps!
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