<https://www.duramaxforum.com/threads/getting-a-p003a-code.1000867/>
<http://schema.org/articleBody>
"Looked it up and it seems either the turbo vanes are sticking or the position sensor is going bad.\n\nAppreciate any tips on how to check either.  I have an autocal but was thinking if the sensor is failing it could still be telling me the vanes are not moving.  Right or wrong?\n\nBoost still seems fine, running between 20-25 under moderate or heavy acceleration hauling the 5er."
<https://www.duramaxforum.com/threads/getting-a-p003a-code.1000867/>