2009 Nissan Altima Hybrid steering problems

The steering lock unit (part number 48700-9n00b) needed replacement. The steering lock unit did not properly engage when the vehicle was turned off. Because the unit did not engage, the vehicle would not start. I was left stranded in a parking garage at night and had to have the vehicle towed. The nearest dealership was in alexandria, va. They charged $900 to diagnose and repair this problem. Since the vehicle had over 36,000 miles, it was not covered under warranty.

It was in night around 11pm, I stepped out to nearby walmart. Upon return, the car did not start. I was getting the "yellow key" symbol. My first impression was that something was faulty with my fob key. I called my friend and got to try the key. Even this was futile. I looked up my manual for this symbol code and realized that there was some malfunction in the keyless ignition system. I was surprised cos the car was well maintained, with periodic service and very low miles(30k).it was perfect until then.