After much research, here is a step-by-step for getting your Vizio Soundbar to work with the Comcast remote using EFC codes (mine is the newer charcoal grey one, works great!)
Aux - Setup (2 blinks) - 11144 (2 blinks)
Aux - Setup (2 blinks) - 994 - Setup - 00169 - Vol Up - Should get 2 blinks
Aux - Setup (2 blinks) - 994 - Setup - 00168 - Vol Down - Should get 2 blinks
Aux - Setup (2 blinks) - 994 - Setup - 00037 - Mute - Should get 2 blinks
Aux - Setup (2 blinks) - 994 - Setup - 00165 - Power - Should get 2 blinks
Aux - Setup (2 blinks) - 994 - Setup - 00164 - Input - Should get 2 blinks
These are optional, I didn't use them:
Aux - Setup (2 blinks) - 994 - Setup - 00036 - <button to use for TVOL> - Should get 2 blinks
Aux - Setup (2 blinks) - 994 - Setup - 00101 - <button to use for TSHD> - Should get 2 blinks
Then set the volume control on the remote and other settings according to the Remote's manual.
0178 this did not work for me. 0134 LG code worked for me.
What is the universal remote codes for a vizio blue ray player
I have a Vizio M470SL used the code for the LG (0178)..worked !
Vizio codes are: 004, 031, 603, 724, 625
004, 502, 627
I used 1517 on the "aud" button for my Vizio sound bar for Time Warner dvr/hdtv box controller. I can't tell what brand it is. Only say's UEI technology. Found that code on the site linked below.
627 A few additional codes just in case 627 doesn't work will be, 507, 507, & 000.
Direct Tv Remote,Put mode in AV1, hit select & mute same time, green light will flash twice. enter code 31517 hit select.
try 04
There is no code. The remote is not code compatible. I called RCA on this too. Your only option I think is to get a learning remote like the Logitech Harmonys.
There are several.. the two that worked for me on 32" Vizio on two different universal remotes are: 1702 and 0606.
1343 is the Visio code.