TPMS light on and fluctuating tachometer

2016 AUDI A6
17,689 MILES • MANUAL
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KIRAN RACER
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  • 2 POSTS
The TPMS light was glowing when I had check the tire pressure and reset also it was saying TPMS system was failure. The other thing engine light glowing when I had put the vehicle in parking mode also rpm was going up and down. what was problem please let me know soon as soon as possible.
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Apr 10, 2019 at 11:06 AM
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SEVAG P
  • ✓ASE Certified Mechanic
  • 405 POSTS
  • ASE Certified Mechanic
Hello thanks for using 2CarPros.

there are many causes that can make erratic idle but most of the time it seems you have intake system vacuum leak.

check our guide to air leak detection:
https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

To narrow down our issue read the fault codes and send to us for more help:
https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Thank you.
Apr 10, 2019 at 11:39 AM
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