2002 Volvo S40 Q&A

2002 Volvo S40 Question: after turbo change and battery disconnected for a moth , car has no idle.

replaced idle control valve ,coolant tem p sensor no help .no codes at OBS show Mod 1 and Mod 30 not worwing could be ECM bad.removed idle control valve with sw on valve does not move to open voltaje dc aprox .90 volts.or need re programing ECM -
Answer 1
drive car for approx 5 mins and see if it relearn proper idle -