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that all depends on what codes are stored in the engine computer, the ETC light is a warning here is something wrong, NOT necessarily a bad throttle body, many things can cause the ETC warning to come on.
you will need at the least a basic code reader to pull the codes that are in the engine computer,once you have them I can direct you in what area needs to be addressed.
the fact the ETC is coming on regularly means there is an active problem and NOT just a reset, and resetting the computers RARELY if ever a permanent fix