I have a mate with a Tech2 scan tool who has limited experience with using it. Do I purchase an op-com kit or will the Tech2 give me the answers I need to diagnose a solution? The error codes are P1526 & P1895 throttle control malfunction & engine torque signal range/performance respectively. These error codes were detected on the Tech2. Problem is I don't know how to work out what needs to be done to fix the error codes. Can anyone help with their experience or do I need to purchase the op-com tool? Is the op-com tool better or not?