Thermador Dual Fuel

My 8 yr old range has numerous sudden problems. Only 2 burners work and the others spark continuously when one is on. My friend looked at it and said the gas isn’t flowing to the left side. The oven looks like it’s working, but doesn’t heat up and the exhaust fan raises, but won’t run. Can all these problems be caused by one part? I had the ERC replaced 3 years ago and it’s worked fine since.
If I do need to replace, any suggestions?
Any help is appreciated!!!