• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

GTP Having a hard time shifting occasionally?

jwjones

New member
Today on my way home from work my car was driving fine, despite the fact I need a new Crankshaft Position Sensor. Well as I start running into rush hour traffic I start to take off (normally) I realize the rpm's start going higher than normal (about 3k) and then it shifted. The Service Engine light started flashing (it was already on due to the CPS), flashed for about 20 seconds then stopped. Car shifted like that about twice within my 50min drive home from work. Doesn't feel like the tranny is going out, it shifts very smooth and have yet to have any issues with it. Could it be related to the CPS?
 


I have read that a flashing SES light means Multiple misfires. But I have no clue what that would have to do with the tranny though...
 
i have the same problem but my SES light doesnt flash, is it cold where you live right now i live in michigan and this only happenes in the cold
 
Flashing SES means possible catalyst damaging condition. Which typically is caused by misfires.

Since crank position sensor tells the ICM what cylinder to fire, which in turn helps calculate load and trans shifting......I'd start with the broken part and work from there.
 
Back
Top