Never heard of that... did you have it done at a Ford dealer? The only time my car gives me a warning light is at a red traffic light. It has this warning light that says "WARNING--this car equipped with a weak pathetic slow Taurus-hand-me-down V6; please upgrade to V8 ASAP!" ...well, ok, maybe the car doesn't say that exactly.. it doesn't have to, the "performance" speaks for itself.