I have a 2006 automatic. Been having issues with the shifter not allowing it to go into park. Was a sticking solenoid next to the shifter, but also bought a new shifter. It started a few times after everything was installed, but now it will not. Install new batttery cables, checked starter and connections.

 

I forget the different models, but you might try pushing on the shifter a bit while trying to start. There was a switch that can get out of alignment. I wonder about the neutral safety switch or whatever it might be called now since you played with shifter. Just so the experts will know, I assume the car does nothing when you try to start it? Any messages in DIC?

 

Tech II would come in really handy too confirm that the car is seeing the all the needed requirements to start the car to begin with.

Hence could be the park relay switch arm on the front of the shifter not set correctly, the shifter cable not adjusted correctly so the TCM is seeing the trans itself in park, or could be that you just need to do a brake pedal position relearn/brake pedal sensor maybe going south and it needs to be replaced and BPP relearned.

Or, if all the requirements are meet, but the engine will not turn/not throwing codes/no DIC messages, could be a simple as just a problem down at the starter solenoid isntead.

If the engine is cranking, but will not start, then you back to the spark/fuel/ air problem. Hence could be a bad fuel pump relay or fuel pump if you don't have fuel pressure at the rail. Could be a loose cam or crank postion sensor if you have no spark. Could be a problem with the MAF/TB/accelerator sensors if you have no air.
Or hell, could be the ECM having problem itself.

So the break down, conditions in the car have to be meet in the first place to make the BCM happy, once they are meet, then BCM sends the command to the ECM to start the car. With a tech II, you can check all the above to see what is not being meet, and makes the needed repair a quick one instead.

 

No DIC messages. Not even trying to crank. Checked the starter when I replaced the battery cables and it tested good. The starter was my first thought. Tried a new shifter and couldn't get it into reverse or park. But the old shifter is in park but still won't start.

 

Shifter and trans has to be in park both.

so is it a tran lever problem or did not not adjust the cable correctly.

Hence need to put shifter into part, then trans lever into the park detent, then lock the end of cable to that lenght.

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