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Had the dealer reset my ecu b/c of CEL. However, it came back on 2 wks later. I was talking to Claire from RMM and he was telling me how we our ecu has long term and short term memory. So once the CEL goes off once, its stored in long term. Thus, it will be very sensitive and it is very easy for it to be set off again. When dealers clear the ecu through the hand-held scanner it only deletes the short term. However, disconnecting the fuses or disconnecting the battery will reset the long term. Can someone verify this is all correct?
 
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