I just had oxygen sensors replaced for my daughter's '99 CSVT, and I only drove four miles before the light came on again. This was the fifth or sixth time I've had it in for "check engine" light. Another time something with the intake manifold was replaced (that time I drove it twenty miles before the "check engine" light came on again). How many chances does Ford get to fix it so that it stays fixed? The car has 74,000 miles on it. Thanks. p.s. Our other '99 CSVT has 85,000 miles and really has been close to trouble free (never had the "check engine" light come on).