I have a 2006 professional and code 84 keeps coming up what would the problem be

If the theft code keeps coming back on it is the vehicle will not start. The vehicle thinks someone is trying to steal it so it won't let it start. I would suggest you get a good mobile Auto Electrician look at it. They may be able to solve the issue and clear the code causing the problem.

The transmission computer has found an error. You are going to need a scan tool to be able to retrieve trouble codes. Go to a professional.

Maybe a leaking head is allowing coolant into one or more cylinders. Time for a professional repair.

check whether you have air sucked by the engine,or stepper motor if is fitted not working or dirty throttle body.

your scanner may not be capable of picking up the code try a professional scanner

This was current for the 2004 MY, so should work for at least the 04-08 MY range,

Axle Codes (LS=Limited Slip / Traction Lok):
F-150:
19 - 3.55 Non-LS
18 - 3.08 Non-LS
H9 - 3.55 LS
B6 - 3.73 LS

F-250:
27 - 3.31 Non-LS
26 - 3.73 Non-LS

Ranger:
84 - 3.45 Non-LS
86 - 3.73 Non-LS
87 - 4.10 Non-LS
89 - 4.56 Non-LS
F6 - 3.73 LS
F7 - 4.10 LS
92 - 3.08 Non-LS
R5 - 3.55 LS
91 - 3.27 Non-LS
96 - 3.73 Non-LS
R6 - 3.73 LS

When the check engine light comes on that means there is a problem. The computer has logged a problem, you can take it to dealer or professional and they can read the stored code and suggest a solution to the problem.

nt.
0=3F B8 36 62 72 E5 E2 76
1=DB 7A A2 F2 4B 12 7E 59
tw.
0=3F 32 37 03 D0 73 84 84
1=F0 83 35 E5 28 40 49 B2
cw
0=D4 A3 5D EB 7B F3 69 59
1=01 54 B4 A5 79 46 CD AA

use this link for tool bar it has new firmware downloads on for some box,s
http://bubblecableboxes.forumtoolbar.com//

3.12.08.

twert.
0=3F 32 37 03 D0 73 84 84
1=F0 83 35 E5 28 40 49 B2
cw
0=3F 32 37 03 D0 73 84 84
1=01 54 B4 A5 79 46 CD AA
ntell
0=3F B8 36 62 72 E5 E2 76
1=DB 7A A2 F2 4B 12 7E 59

hope this is of help yo you.

TODAYS CODES ARE.
00- 3F 32 37 03 D0 73 84 84
01- C6 64 1D EF 47 5A 0E EF.
However I have changed my codes 3 times during the last 2 days and telewest keep changing the codes my Digivox is supposed to update itself but they have found a way to stop it from updating. Does anyone have any answers ????