jkrown

I have a 2005 Honda Civic and live in Minnesota. When the temperature drops in the winter, after the car drives for 10 minutes or so on a very cold day it will downshift on the freeway and I need to pull over, turn it off, wait a few minutes, and start it up again before I can drive it in a higher gear. It only happens once a day. 3 years ago we had the throttle body assembly replaced, and that worked initially and then the same symptoms started after a year, so we replaced it again, which was still covered by the warranty. But now after another year it is happening again, and replacing the assembly will cost another $600. What else might be causing this problem???? Thank you.

Former User

Can I assume the car has an auto transmission?

Any CEL codes or transmission codes?

Have you tried three consecutive ATF drain-refill cycles?