Help me! Check Engine P0740

[TahoeThomas]

I got a problem with my 2001 Tahoe, Check engine light, and the reader tell med the code P0740 (Torque Converter Clutsh Circ Malfunction) can someboddy help me and tell med what i can do ? I changed the TPS sensor, and when i restarted the system the light dissapered but now it is comming back every time i start up again. Also if i restart the system the light i away durring driving, but if i stop the car en wait for a few minutes en start the car again the light is back.

 

[east302]

It's referring to a short with a solenoid for the torque converter. Sometimes a faulty ignition switch can cause the power disruption.

Here's a link to a forum with diagnostic information for a Chevrolet Blazer, but it's probably similar to the Tahoe as (I believe) they both used the 4L60E transmission:

http://www.blazerforum.com/m_154858/mpage_1/key_/tm.htm#154858