Hi,
This could be related to the manifold absolute pressure sensor (MAP). Let's start by checking it. First, check the connector and wiring at the sensor. I attached a pic below to help you locate it. The code indicates a low voltage issue. That could be the result of corrosion in the plug.
Let me know what you find or if you have other questions.
Take care,
Joe
See pic below.
Image (Click to make bigger)
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Tuesday, April 6th, 2021 AT 8:20 PM