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if its continuing to limit the engine after off/on cycles , it still sees the problem, obd ii codes have two modes, one when the problem happens, then another saying it did happen in the past, so pending and past.
more than likely you've got an actual problem, whats the code?
most modern ecu's can't be reset by disconnecting the battery, its stored in flash memory so it has a 20+ year retention lifetime, its possible to force the ecu to internally corrupt itself and and reset everything, but you're much better off getting a code reader.
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