Hello, i have issue i cant find why. Everytime i drive my car, after 15-20mins the rpm drops to 0 and goes back to where it was in less than 1 second and after tcs and a solid red key is lit on dash. I tought it could be related to immobilizer but dont find anything about that. I have a 2007 with smart key, has a new battery.

 

The RPMs drop to zero as in the motor cuts off, or just the tach drops to zero?
The solid red key is battery related, iIrc.
Check the terminals are clean and tight on your battery.
The terminals can be tightened all the way, but still be loose from stretching.
I had to shim mine.

 

The tach drops to 0 and goes back to where it was, sometimes it happens after 20 min sometimes 1-2 mins. I dont have the oem battery and i do have one terminal that is not in perfect shape but is tight, ill look into that
Thanks!

Feel free to submit your other hypothesis

 

Ok. The red key security light made me think of the battery first. I had an issue about a year ago when I had a short and flashing light, that's what I remember reading trying to figure it out.
If it's the tach only , I would think it was a bad connection.
If the engine shut off, I would think fuel delivery, but then the key light would be unrelated, I think.

 

I checked the codes with accesport and these were the ones active. I searched and might be abs connectors. Ill look into those

 

Cleaned both front abs connectors and went for a ride and no more lights ! Fingers crossed hope its not gonna happen again

Edit: on my way back, the lights came back too

 

U have a wiring and or electrical issue