GT1 readout for DSC problem

[inky]

My dash lights have been on for the last year and I finally had it read`with a generic reader while replacing my entire cooling system. Code for that came back as unable to connect with steering angle sensor. Replaced it and took it to an indy to get it to talk to the comp and the codes came back as:
1. DME: 0045-multifunction steering wheel interface monitoring..123-Map cooling,204-cc-idle speed leakage air signal impassable.
2. ABS: 07- Left wheel speed signal implacable,{06-same} 20- steering angle
3. EGS: 149-95- can wheel speed implacable
4. ZKE: A4-164- door driver switch
5. LCM oil level
Can anyone offer` insight to what should be changed next? Indy suggested DSC computer and wheel speed sensors but I'm hesitant cause one wheel speed sensor is 1 year old and he wants to replace it because "They have to be done in pairs"
I've had my expansion tank blow up once all over the DSC module and an overflow from the radiator on the module also so dunno if all that coolant may have had a long term effect on the module or not.