Error code p0471

[_idubbzz]

2019 Dodge Ram 3500 with 145,000 miles. Truck throws error code p0471. Then goes into limp mode with no power. With turning off the truck and deleting the code it only would drive for a short while before throwing the code again. Just did fuel filter change last week. Would appreciate help on how to first find where the sensor is located and then whatever else info I would need to help fix it. Thank you all for your time.

 

[flan]

It’s right by the egr valve, on the passenger side of the engine. I believe it’s green and has a tin foil looking cover on it. Right in plain sight, very easy to access. Check for it being clogged with soot.