You add a bottle of techtron fuel cleaner to your gas tank after driving 30miles SES light came on steady you wonder if its because the computer detect it but that hurt anythingright?

It is possible that adding the Techtron fuel cleaner to your gas tank triggered the SES (Service Engine Soon) light to come on, but it is also possible that the light was already on before you added the cleaner. To determine the cause of the SES light, it is best to have your vehicle checked by a qualified mechanic.

Adding a fuel cleaner to your gas tank should not cause any harm to your vehicle, as these products are designed to be safe for use in most vehicles. However, it is always important to read and follow the directions on the product label carefully to ensure that you use the cleaner correctly.

Overall, it is unlikely that adding Techtron fuel cleaner to your gas tank directly caused the SES light to come on, but it is best to have your vehicle checked by a mechanic to determine the cause of the light and ensure that everything is functioning properly.