Crispy808

I was autocrossing my car (MY 2007) yesterday, and when I tried to start the car up after a run, it wouldn't start. The starter turns over but it won't fire.

The main thing I noticed is the green key on the dashboard doesn't stop flashing after the key is turned to the on position. My friend confirmed that the green key symbol on his car flashes a few times and then stops. After researching/reading, it looks like an immobilizer issue. Note: my car has an aftermarket alarm installed.

Does anyone have any advice on how to start troubleshooting this issue? Is there a fuse(s) I should look at? Where is the physical location of the immobilizer and can I test it? How likely is it for the transponder ring to go bad? Do I have to get the keys reprogrammed?


Thanks,
Chris

Crispy808

Ok, so the car starts with the spare key! Does this rule out the immobilizer? I'm thinking it's just a bad key. How the key became defective is beyond me.

I spoke to the dealership and they want $150 to run diagnostics on the immobilizer, plus another $80 to reprogram the key.

P-Dub

Same thing happened to me 2 times in the past 2 weeks. Spare key didn't work, let the car sit for several hours and it started....don't know why. I did research the immobilizer and will probably replace it. In the mean time, I disconnected the immobilizer from behind the key ignition (you can feel the wire harness tab from underneath the dash right behind the key) and the green flashing light stayed on. Plugged it back in and the light went away. I have the OEM alarm, no issues for the past week.

vasquezgno

Crispy808

I'm gonnna trust my gut and say that the immobilizer is fine and just replace the key. I found a local locksmith that will do everything for $100, key included.

For anyone that does need to replace the immobilizer on an AP2, the Honda Part No. is 39730-SLA-J01.

Jabneel Perez Colon

I’m having the same problem I have a 02 everything stock and now it got to the point that I haven’t been able to start the car in days what should I try

Chuck S

-- Chuck

windhund116

Think you need to have key re-programmed.

3lement85

Replace the reader which is around the key ring. This is how mine failed. Mine did exactly what was described until one day it just didn't fix itself.

Static sean

what's that part number for what your referring too, my green key wont light up on the dash as i put my key in but give it afew hours an it will start up fine.