Recreational Vehicle Lpg Tank Valve/gauge problems of the 2007 Suzuki XL7

I have a check engine light that has come on. I took the car back to where I purchased the vehicle, they tell me it is too bad. That the car was sold as is. I take the car to a local mechanic who says that I need to have the timing chain and tensioner replaced. It will cost $600 plus parts to repair. My vehicle has 116xxx miles. There is paint chipping, and my instrument cluster is showing the temp gauge on hot and rests in the middle position after sitting over night. A class action lawsuit against Suzuki should be considered, because the number of complaints for this issue, and there has not been a recall, is outrageous. This is a 3 day repair job at minimum. Suzuki knew this was an issue, they should show some morality and ethics as to offer their consumers a remedy to this issue. Something needs to be done to rectify this problem. Before an accident or loss of life happens.