hey all i have had this problem for about a year now and i am just about ready to blow the car up so any help would be appreciated. MY car used to stall out while driving sporadicly at high speeds. The car would begin to stumble and the check engine light would come on and the car would completely stall out. then the problem began happening more often a couple of times duringa drive. I have gotten numerous codes from all this including 14 , 21, 22, 43, 46, and 53 and i didnt even think that was a code nor can i find it anywhere online. So i changed my TPS car still was messed up, and wouldnt even run for 2 minutes before it was stalling out. so i just changed my CTS and the car still wont run. i pulled my ECM out and the connections all seem to be good and the motherboard apears not burned out or anything. i am clueless as to what to do with this car now my mechanic buddy hooked it up right after i changed TPS and it ran fine everything reading proper numbers on his scanner , i drove it around for 2 hours and the car ran beautiful. tried to take it out the following weekend and it stalled out after driving it for 5 minutes, then took it home and it wouldnt even crank the next day, then got it to crank and thats when i decided to change the CTS. after clearingcodes this time i am only getting a code 46 but the car starts so i dont know how the vats system could be involved after the car is running. i believe the other codees are getting messed up by maybe just one problem, it appears the car is failing its functional test and thats why it spits out al htose other codes after a while. well thats it the car sits in my driveway and i am out of luck so see if you guys can fix this one.

 

14 - CTS voltage low
21 - TPS voltage high
22 - TPS voltage low
43 - Knock Sensor (ESC) problem
46 - Does not exist (at least in anything I have that shows codes for these cars)
53 - High battery voltage

Check that code 46 again...

 

Code 46 has something to do with the VATS system.

 

David Rousch is correct about the code 46, for the 5.0L & 5.7L TPI models as well as the V6 models it is for the Vehicle Anti-Theft (VATS) system. On the 5.0L TBI model it would be code 53. On his car code 53 means System Over-Voltage.

 

but does anyone have any idea as to what to do about a code 46 someone has told me my key may be bad but i have gotten a newer one made about a year ago and i think that would only prevent the car from cranking

 

You might have a bad wire or contacts inside the ignition lock cylinder.