No key detected, checked steering lock module already, still no key detected

[Johnx]

Hi everyone, a new guy here, any help will be highly appreciated, here is my car's (Altima 2009 S, 4DR.) problem:

All of sudden, it says no key detected, googled and followed what the tutorial instructed: 1) tapped the steering lock module, didn't work. still no key detected, 2) removed break-away bolts, and pushed the shaft of the module down, and pushed start button at same time, still no key detected. Totally no idea what wrong with the car now, watched quite a few videos, mostly as long as they removed lock module and push down the shaft, it's at least allow you to start your car once.

I tried to list some other possible causes, but not sure, such as: 1) the PCB in the module is down, so needs a new module; 2) the steering lock fuse is broken. (either the one in the fuse box under engine hood, or the one at driver side, or both); 3) battery fuse box is broken; 4) the neutral safety switch sensor is broken. (but will it still allow me to turn from "lock" to "acc" if it's the case?

Please kindly let me know if any thoughts, thanks again.

[VStar650CL]

I presume you've changed the battery in the fob? That's the most likely cause of no-key messages. Other stuff like the ESCL can cause lights and other messages, but "No Key" without any other symptoms means just that, the car isn't detecting the key. The problem is almost always on the fob end, whether that's a dead battery, bad battery contacts, interference from a cellphone or something else on your person, etc.

[Robyn C]

I recently went through the "no key" issue on my 2011 Altima S coupe. I changed the battery in the fob, checked all fuses, antenna amps, steering lock, etc... nothing wrong with anything. It wouldn't even work when I put it into the spot you put the fob into when the battery is dead. Finally I inspected the actual circuit board of the fob and thought some parts just didn't look right. So I bought a new fob for $16 on Amazon and had a guy come out to reprogram the new key fob to the car (which was $140) And that was the problem that whole time! You don't need a new key made, just take the one you have and put it into the new fob.
I hope this helps out !