Error message "reduced transmission performance"

2014 VOLVO V40
49,000 MILES • 2.0L • 4 CYL • 2WD • AUTOMATIC
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ANT0606
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Car was serviced about a month ago at the dealer. Had no problems whatsoever. Just got in the car and the error displayed “reduced transmission performance“: V40 T4 Car does not shift gears, high revs. Switched it off and back on again. Error message was off and gears changed but gear shifted not smoothly and jerky. Revs are also still higher than usual.
Aug 9, 2018 at 5:22 AM
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STRAILER
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Hello,

This sounds like you have a transmission turbine sensor that has gone out or is not reading correctly. Lets run the codes first to see what comes up.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Here is the location of the sensor (below).

Please run down these guides and report back.

Cheers, Ken
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Aug 10, 2018 at 12:44 PM
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ANT0606
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Hi, Volvo dealership just informed me that the transmission seals have to be replaced. Gearbox to be taken out and I am without a car for four to five days.
Aug 13, 2018 at 3:50 AM
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STRAILER
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49,000 miles that is a little premature. Did they say how much it will cost?
Aug 13, 2018 at 1:15 PM
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ANT0606
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Car is still under maintenance plan. Will know cost when I collect it.
Aug 14, 2018 at 12:56 AM
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STRAILER
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Well that is good, let me know what happens. :)
Aug 14, 2018 at 10:38 AM
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LOONEYRAY
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I’m have the same problem, did you manage to get it fixed?
Sep 20, 2022 at 6:05 AM
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STRAILER
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They never got back to us on this problem unfortunately, but we can pick it up and find a solution. It sounded link a turbine sensor to me, but we should run a CAN scan to see what codes come up, it is easy to do. You can get a CAN scanner (Controller Area Network) from Amazon for about $36.00.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

Here is a scanner link:

https://amzn.to/3eCqWWw

Please let me know what happens.
Sep 22, 2022 at 11:13 AM