P1545 and P2100 Throttle Body Codes?

2016 VOLKSWAGEN PASSAT
142,000 MILES • 1.8L • AUTOMATIC
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BHAMDOC1
while parked and idling I was cleaning it up, suddenly it started to idle rough, p1545, and p2100, deleted both but p2100 stayed pending...
Jun 26, 2026 at 5:35 PM
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STRAILER
  • ✓ASE Certified Mechanic
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The first thing I would do is service the throttle body, here is a guide to help you and images down below to help as well.

P1545 = throttle valve control malfunction / throttle actuator issue
P2100 = throttle actuator control motor circuit/open

https://www.2carpros.com/articles/throttle-actuator-service/

You might want to replace it since it is buried under the intake manifold. Check out the images (below). Please let me know what happens.
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Jun 26, 2026 at 10:23 PM
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