Hyundai Sonata The Sonata has grown to be the premier mid-sized sedan of the Hyundai name with the many interior options and the powerful V6 engine.

Transmission problems

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Old Mar 7, 2025 | 10:24 AM
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andresouza1987's Avatar
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Default Transmission problems

Hey guys!


I have a 2007 Hyundai Sonata GLS 2.4 and I have a problem that I can't fix.



I will report the problems and what I have already done, I hope an “angel” who has already had the same problem appears to help me, my head is hot with this car.



1.The gears do not appear on the dash

I replaced the Inhibitor Neutral Safety Switch, tested the lever and it is perfect.

I tested the orange pin and there is no 12v, I made a bridge and so the “D” appears on the dash, but that doesn't solve the problem, I just did it to test the dash.



2.The lever does not release when I press the brake, I can only move the lever if I release the lock manually. I have already replaced the pedal sensor and the brake light works fine.



3.Speedometer not working.

Replaced all 3 transmission speed sensors.

No ABS error, wheel sensors are good.

When I use the scanner I can get speed information.



4.When I drive the car it doesn't change gears.



Has anyone had a similar problem?

My suspicion: TCM/TCU

After changing all the sensors and the problems are all related to information that is processed by it


Thank you in advance!
 
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