Check powertrain warning

[C-man]

Everything seems normal except the temp gauge dropped to cold instead of 1/4 warm where it usually sits.
06 6ltr 6 speed amanual Ute
thanks in advance

 

[gungazza]

check coolant level bleed it with heater on go from there check for leakes

 

[gungazza]

you said power train warning have you scanned it if so what code you can google the code for more info ie code p1233

 

[C-man]

you said power train warning have you scanned it if so what code you can google the code for more info ie code p1233

how do I scan it? do I need to have a mecanic's scaner?