Heating problem - heat on passenger side - not on drivers side
on 2004 Chevrolet Monte Carlo

Cold air blowing out on drivers side - heat blowing out on passenger side - what do I do to correct. this is the 2nd time - first time they blew something out but this time it didn't help I have a diagnostic code of PO128 and PO171

Asked by for the 2004 Chevrolet Monte Carlo
1 answer
maybe the blend door is not working