I have a buick lucerne model 2010 3.9 v6.
the check engine indicator is on and I received the following errors:
p0700 transmission control module ( tcm ) requested mil illumination
ECM U0140 Lost communication with body control
uo121 lost communication with antilock brake
ECM U0101 lost communication with transmission
ECM U0073 control module communication bus off
when the errors are shown, all the control panel indicators loosing their balance and going up and down. In addition, the t/c and abs lights also going from on to off mode.
when I reset all the dtc'* with the tech 2 device the vehicle function is normal, after a short time all the errors start again.
Thank you all for your help