What does TCU failure mean?

1 Answers
JessicaAnn
07/29/25 8:46pm
TCU failure refers to an automatic transmission malfunction. Below is an introduction to TCU failure: 1. TCU, the automatic transmission control unit, consists of a 16-bit or 32-bit processor, signal processing circuits, power drive modules, etc. It is commonly used in AMT, AT, DCT, and CVT automatic transmissions to achieve automatic shifting control, making driving simpler. 2. Common symptoms and solutions for TCU failure: (1) Oil leakage: Oil seeps from the transmission housing or oil pan. One cause is aging or poor sealing of the seals, while another is casting defects in the housing. The solution is to replace the seals or the transmission housing. (2) No response when shifting into gear: The vehicle does not move after shifting into D or R and releasing the brake. This is often caused by damage to the input shaft or reverse clutch, or failure of the D or R brakes. The solution is to replace the damaged clutch or brakes.
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