CES and OD light flashing
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Mountain Pass
Joined: Jun 2016
Posts: 214
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CES and OD light flashing
This morning the engine light came on and the 'OD off' light on the shift level was flashing. I know I have a slow leak in my transmission lines (getting that done over winter), so I pulled the dipstick and there was no fluid visible. It wasn't quite up to operating temp yet, but I put in a quart and the OD light went off and it shifted normally after a few miles. Engine light is still on though so I will check / clear codes when I get it back home. How low does the fluid have to get before it triggers the light?
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,695
Likes: 2,616
From: SE Florida
Low fluid doesn't trigger the light. There is nothing that measures the fluid level in the transmission. If it is low enough that the clutches slip that will set a code, flash the OD OFF light, and damage the slipping clutches.
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Mountain Pass
Joined: Jun 2016
Posts: 214
Likes: 25
Hmmmm. Also, it came on immediately, just as soon as I started it. How would it know it was causing slippage if it was still in park? Also, it was pretty cold, maybe that combined with low levels did it.
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