722.6 transmission - ODB error code 740
 

"Torque converter lockup clutch has excessive power consumption"

This is what the Mbz code reader shows. It is more detailed than the common reader. The car, 2006 CDI, runs good. I reset the code as I believe it may be a one off. What may have gone wrong? The torque converter or the solenoid? Something sinister or I can ignore?

Btw: car has 320k but runs great.

ODB error code

That Ole Dumb Broad will do it every time!!

The trans?
??????

I can only guess here, but I would think the only power to the transmission converter lock up clutch would be through a converter solenoid. Solenoid could be shorted internally or wires shorted to ground.

The clutch solenoid is part # 240-270-17-00.

I suspect it may be the culprit. It is not difficult to replace with transmission in situ. However, it could also be the torque converter which affects the solenoid power consumption resulting in OBD code 740. I reset the code and car drives perfectly, it drove great with the code also. The conductor plate was replaced 60k ago. I will keep an eye on the code before I do anything. I hope it is an one off occurrence and nothing serious. I just wonder any forum members have any experience with this code. Thanks.