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If it went into reduced engine power it has a code stored. Find out what it is then go grom there dont just start changing parts and assuming what may or may not be wrong.
Great point! I always overlook that part... I've seen the msg often and it never throws a traceable code, the only reason I know its the TB harness is thats what I traced it to after noting the msg appeared after I hit a big bump a few times...R/