2007 Pontiac Grand Prix Sedan.3.8L. Tried key codes for 2 hrs. Question = I bought the key and they gave me the codes, key in 10 minutes, off 20 seconds x 3 then try to start. Every time I did it another light would turn on the dash, then it started making clicking sounds in the glove box. But still would not start. I did it again and the lights started flashing outside, a message talking about the battery saving failed, charging failed, and the TC flashed as well as abs and other things but it still would not start and the lights were still flashing.
How do I correct this problem and get my key and car to start!???
Answer: First of all, you've probably run your battery dead or too low to continue the theft learn process. You need have a battery charger or jump box hooked up while you do this 30 minute procedure to make sure you don't lose power.
I would give it one more try with a charger hooked up and if it still won't start, you obviously have another issue going on. You could have more bad than just the key, such as an ignition cylinder and/or passlock sensor. You state that you have warning lights on, but no trouble codes. If there are lights on the dash, then you do have codes stored somewhere.
A regular scanner can't tell you what codes are stored anywhere else except the engine computer. You definitely have theft deterrent codes in the Body Control Module by now with all the trying you've been doing. You'll need those retrieved to help diagnose what the problem is. You are probably going to have to take the car to a GM dealer for proper diagnosis and re-learning of the theft system.
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