Check engine light came on 2weeks ago. Brought it to local Toyota dealer for recall of frame treatment for northern states that wasn't done, so had them check out eng. light also. They said the catalytic converters were not working right. Only 2,600.00 to do both, what a deal! I thought they should last up to 1,000.00 miles not 40,000 miles like I have on my truck . So if I don't get it fixed , what could happen?