code U1016
Outstanding HDF Member
Joined: Feb 2015
Posts: 2,414
Likes: 433
From: Arkansas
Ok, having just stumbled upon this thread, the HIST part means that it isn't a current code but rather a historical one. These will reset after a number of ignition cycles (I cannot remember the exact number right now) but the current state is normal operation. The MAP sensor being loose is likely what cause the stumble and possibly the code as the MAP sensor leaked air in and quite possibly showed 0 pressure causing the ECM to question as to weather or not it was working in the first place thereby setting the code. The intake leak allowed unmetered and and unaccounted-for air into the engine causing a lean condition and a stumble.
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Stellar HDF Member
Joined: Sep 2017
Posts: 2,144
Likes: 577
From: memphis
Ok, having just stumbled upon this thread, the HIST part means that it isn't a current code but rather a historical one. These will reset after a number of ignition cycles (I cannot remember the exact number right now) but the current state is normal operation. The MAP sensor being loose is likely what cause the stumble and possibly the code as the MAP sensor leaked air in and quite possibly showed 0 pressure causing the ECM to question as to weather or not it was working in the first place thereby setting the code. The intake leak allowed unmetered and and unaccounted-for air into the engine causing a lean condition and a stumble.
thanks for the reply.
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