lock-up clutch?

[619_Cb9]

i got my transmission and timing belt repaired at a car shop a couple months ago...the D4 light has been flashing ever since...the car has run fine but today i got my lazy ass up to figure out why the hell its blinking...so i decided to check the Service Check Connector and according to the TCM code, my lock-up clutch does not engage...can someone please explain wth this means

TCM codes here (2 blinks)

[fast93accord]

that would be referring to your torque converter lockup clutch. When fully warmed up and your cruising at like 60mph, and you decide to give it a little more gas, the torque converter lockup
clutch with ingage and the revs will drop about 300 rpm.