EGT isn't used in the tuning. Don't need the sensor and removing it won't change anything about how your car runs. The only function it serves is as a "go / no-go" gauge on the engine. As you probably noticed when you had the CEL, "no-go" really means no go. If it's in 'go" mode you're all good and there's no need to "tune around it" of ever replace the sensor.