P219b code. What to check first

[Cummins diesel]

I just bought a 2015 Jeep Grand Cherokee with the v6 engine and on the way home the check engine light came on and I got it checked this morning and have code P219b. What’s the first thing I should check? Thanks

 

[Cummins diesel]

I guess that I should have said the miles to. 2015 Grand Cherokee High Altitude with 112,000 miles. Engine runs fine but is a little uneven at idle. Any thoughts?

 

[WY-Dave]

What are some of the common causes of the code? Causes for this code may include: Engine vacuum leak (large) Defective oxygen sensor/s Burnt, chafed, broken, or disconnected wiring and/or connectors Engine exhaust leaks A faulty mass air flow or manifold air pressure sensor Bad fuel pump or clogged fuel filter

Read more at: https://www.obd-codes.com/p219b
Copyright OBD-Codes.com

 

[Cummins diesel]

What are some of the common causes of the code? Causes for this code may include: Engine vacuum leak (large) Defective oxygen sensor/s Burnt, chafed, broken, or disconnected wiring and/or connectors Engine exhaust leaks A faulty mass air flow or manifold air pressure sensor Bad fuel pump or clogged fuel filter

Read more at: https://www.obd-codes.com/p219b
Copyright OBD-Codes.com

Thanks I was just wondering where I need to start. If I can’t figure it out I’ll need to take it to a mechanic to look at