AT light is on-Tansmission jerking
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Junior Member
Joined: Dec 2023
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From: Hollywood, FL
AT light is on-Tansmission jerking
The AT light is on, on my 2009 Mazda 5 van. The transmission jerks when I first put it in (D). The diagnostic tool shows no codes. For the past few months there has been a high pitch whirring that shifts sound with the shift of the transmission. I replaced the TCM about 8 months ago and am wondering if that might have anything to do with the AT light coming on.
Senior Member
Joined: Oct 2018
Posts: 10,593
Likes: 229
From: Northern California
It helps to give all the same info you would service shop?
miles on running gear
last type service done
when was the last service done on the transmissions other than the TCM
What was the reason the TCM was replaced
miles on running gear
last type service done
when was the last service done on the transmissions other than the TCM
What was the reason the TCM was replaced
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