Aveo 2011 1.4 Hold Light Flashing and Check Engine Light (U0101)
YOU ARE 180 DEGREES OFF BASE,
In the usa
HOLD HAS ZERO TO DO WITH ENGINE, IF IT RUNS OK AND DOES. (A WEAK ENGINE CAN DELAY UP-SHIFTS YES.
you spend all that money barking up the wrong tree, the correct tree is the transmission even the scans told you that..proof. below.
U0101,
Lost Communication With Transmission Control Module
HOLD : what is it stated here: in the SM:
quote.
The hold mode switch is placed on the shift lever console. By pressing the hold mode switch, the hold mode is turned on and the hold mode indicator in the instrument cluster illuminates. If the hold mode is turned on, the automatic transmission will stay in a specific gear range. To turn off the hold mode and return to normal operation, the hold mode switch must be pressed again.
so turn off HOLD.
if hold fails to work right, then my guess is the silly switch is bad.
if hold is never used at all (what good is it IDK) Id even disconnect the switch and see it hold shuts off
the switch is 2 pins, SPST switch, and open or shorted pins is the goal , the cluster light HOLD must go out, so try that.
did someone spill coffee on the switch. it is failing.
computers hate water, so do cars PCM/TCM etc.
or the comm1 error causes the switch to be scanned wrong,.
comm errors are never good; but it may be a lie
the u0101 was from some other long ago stored event like ,
a low car battery or jump starter your car or to others.
some DTC errors can hold for 30 driving cycles so reset all DTC codes and see if it comes back .
one other cure is remove battery neg lug for 1 full hour.
then put back and all things then reset and need to auto relearn.
even lost radio station stored settings. and transmission shifts hard for a day or less.
also use modern scan tool not $17 code reader, a 2008 or newer real scan tool to see all Chevy codes,
only do my reset as last chance garage. TCM acts odd and no way to fix it. so we reset it and cross fingers.
no P07xx DTC errors told , a good scan too will see that
and you have not one.
so the hold switch bad or being bumped by car toys, purses. and what not. keep junk away from all car controls.
for sure no water bottles under brake pedal.
do not drink near any switches ever, (in cars for sure)
soda pop even conducts electrons with the acids in it.
