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Old 06-23-2014, 11:40 PM
wellingtonamaral wellingtonamaral is offline
Join Date: Jun 2014
Location: Wisconsin
Posts: 6
wellingtonamaral is on a distinguished road
Transmission failsafe + code P0377

So, while driving my '04 X5 3.0i, E53 (GM automatic transmission), it went into transmission failsafe, and I read error code P0733.


Starting the troubleshooting from the cheap possibilities: I did a partial transmission fluid change (without pan drop) and also changed the battery. I was overdue for both anyway.

I just recently bought the car, and it has driven fine and shifted fine until this failsafe kicked in. I can still drive it in manual mode without triggering the failsafe, although the 2-3 gear transition is still a bit slow on the shift.

Relevant or not: I also don't know whether it is normal for this model, but in the first gears, as it shifts up, I hear a loud air-blowing sound...sounds like a turbo -- though there is no such in this car.

Any ideas before I surrender to a local dealership would be greatly appreciated!!

P.S. mistake in the post title: should read P0733, not P0377. (Thanks RRPhil)

Last edited by wellingtonamaral; 06-24-2014 at 12:06 PM. Reason: correction
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