ok well im running a couple codes really just wanna know y both of these would go off? some kind of leak in the fuel tank? i think the guy who had the car b4 me had this prob i got a 00si wit gsr ...i put the gsr in. the 90 code just makes me think 90 is the real code and 45 is just hanppening cuz of 90

45 - fuel system too lean too rich , malfunction of fuel monitoring system
90 - leak detected in fuel tank area

ne ideas?

 

Look for any signs of gas leaking out of the tank or the fuel lines.

 

i cant find anything