Having a lean condition isn't good for the motor.
Lean is higher oxygen and lower fuel. Oxygen burns hotter than fuel. Being lean is to have a condition where the fire in your engine is hotter. The results are increased wear on valves and potentially melting the aluminum of the head. The melting is under extreme conditions.
You are in a situation where the ECU has essentially set itself into a 'safe mode' of pre-programmed settings if it feels the data it's receiving from various sensors is questionable.
The 0073 code, IMO, is the key. This is a failed bus on the ECU if I'm correct. You can try getting a used ECU on ebay or another source of used equipment or replacing with OEM. Validate what I've said, ECU's are expensive.
Best of luck.
PS. Too many variables on the ABS. If your front tires are over worn, it can act up under hard braking and give the steering wheel a good shake. Validate tire tread depth and brake pads as a starting point on the ABS issue.