Hello ! I have saab 9-3 2002year , 2.0t engine. Never did SPS for saab before so i encountered a following problems. This is my sequence:

1. Requested info from car using TECH2 SPS.
2. Connected to laptop Global TIS SPS, it shows VIN number and that ecu software in saab is 55556282.
3 Can not load software to TECH2 , because i got warning something like "ECM already have newest software installed". VIN change method as i usually do for opel's here is not allowed.

Question : How to reflash that ecu with same of older software using TECH2? ECU have DTC P0606. I want to firstly try reflash ECU, maybe it will help. Anyway, i want to learn how to do it. Any suggestions here ?