Braemar tqm623 gas ducting showing code 7

What is a Braemar??

I recommend a mechanic to do

the lamps all change at engine stall , did it stall.
at about 300 rpm all engines (gas) stall, and the ECU changes state.
all cars.
does car run, ok, drive ok ,start ok, and sound ok? just a clue here.

it sounds like that might be the first place to look

p0526-- fan speed sensor curcuit, p0495 is fan speed high, p0410 is secondary air injection system malfunction.

you need to change a part on the blower syatem , that a resistor is mounted near the fan . that will give you the lower speed

Change the rheostat. On older trucks it is on the firewall beside the blower motor. Hope this helps.

There is a fuse, but the heater motor (A/C) usually also runs some other things, but it is cheap to change the fuse and see what happens. More likely is the fan speed resistor pack. It isn't the easiest thing to find, but it is usually located in the air duct someplace under the dash. Does it do the same thing on all speeds, or just on one speed? If it does it on all of the speeds, then its more likely the fuse or the motor. If it only does it on one of the fan speeds or 2 out of 4 speeds, then the resistor pack is more likely.

Hi, I changed gas cap and it worked.
Light went off few engine start later.
During my research I found a really interesting post on jeepaholics forum, it include listing al possibles causes, and fixs http://www.jeepaholics.com/support/topic.asp?TOPIC_ID=37851