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Old 02-18-2023, 08:40 PM   #1
SFH
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8.1L code P1516 TAC position position performance

I recently pulled a code on my w22 8.1L gm engine. The code stated position performance but not faulty. I will try a reset in the morning. Any ideas other than a reset. Don’t want to cause any undue damage to engine. Thanks in advance!
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Old 02-19-2023, 07:28 AM   #2
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Could be a dirty throttle body. loose wires at TAC or throttle body. Water intrusion at TAC. Code is specific to GM. Needs investigation before driving as total failure could lead to no throttle response.
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