Set the Instant Pot to Saute mode and add the olive oil.
Add the onion, carrots and celery. Cook, stirring occasionally, until starting to soften, about 3 minutes.
Add the garlic, cumin, oregano and salt. Cook for 1 minute.
Add the broth, water, tomatoes, chipotle peppers, adobo sauce, split peas and potatoes.
Put the lid on the Instant Pot, close the steam vent and set to HIGH pressure using the Manual mode. Adjust the time to 23 minutes. The Instant Pot will take about 20 minutes to come to pressure.
Let the pressure release naturally for 10 minutes, then release the pressure the rest of the way.
Season to taste, serve and garnish with cilantro.
Notes
Please note that I am not a medical or nutritional professional. I provide nutritional information for my recipes as a courtesy to my readers. It is calculated using the LoseIt! calculator. While I attempt to provide information that is as accurate as possible, you should calculate the nutritional information independently before relying on it.