GM TAC Motor Failure Anlaysis

[@yamahaxs6501]

Great analysis. As a side note, drive by wire systems are great...when they work. They are undoubtedly one of the most unnecessary electronic systems ever developed. A great engineer makes complex things simple, not the other way around. Also, I'm dealing with a TAC system giving me fits right now

[@TechScottBrown]

Thank you.
I disagree on the “unnecessary” statement. As emission controls thresholds continued to tighten, this system became an important solution. For the most part, these systems are pretty reliable and safe.

[@greenbudkelly2820]

Wow…..true diagnosis and analysis.
Great workmanship.

[@JoesAutoElectric]

Fantastic captures and great analysis sir. Thanks for sharing.

[@TechScottBrown]

Joe's Auto Electric thank you, tell a friend!

[@papergatorzfedducca7998]

I have a code for p1518 and I had just cleaned my throttle body because it was idling rough and when I’m at a stop sign sometime it still be wanting to go instead of staying stopped. It only does it sometimes. And it’s using a lot of gas. What could that be?

[@larryterhaar6576]

The tac motor is in the throttle body?

[@TechScottBrown]

@@larryterhaar6576 Yes, this is correct.

[@autoemmissions3904]

Were you able to find why it set the P2135 TP1 & TP2 correlation fault?

[@TechScottBrown]

After replacing the throttle body and pigtail connector, all problems disappeared.

[@billyyoder8171]

Thank you Scott. Good job. Have a blessed and safe week to you and your family.

[@TechScottBrown]

Billy Yoder thanks for the kind words!