I had a check engine light come on last week. So I had it checked and it came up with low voltage to E.G.R. valve. So I thought I would clean it. When I got home and took it off and the bolt on the backside of valve was loose so the exhaust was leaking and burnt the gasket. So I thought cool problem solved. Cleaned valve tightened bolts and replaced gasket reset light, Drove down road a quarter mile and light came back on. Had it checked today and same code came up. Had them reset light and it came back on. Could have it burned up the E.G.R. with the exhuast leaking?