Got the check engine light, then the following codes:

6. Idle Speed faulty (how do I adjust this? what is the correct Idle speed?

9. Intake air temp sensor. Open or short ( should I just replace the sensor?)

17. Data Exchange fault between individual control module. ( don't even know where to start on this one?)

26. Upshift delay switchover valve, circuit open or short. (not even sure where this is located to check it out)

Any help would be greatly appreciated.

Thanks