MERCEDES BENZ P CODES (POWERTRAIN)

No Funny Noises, Drives Great.

Codes P0402 And P0422? Emissions Codes?

If I Delete It Will Come Back In A Couple Of Minutes. Ambient Temperature On The Dash Is Reading Correctly.

This Is Actually A 13 Model Gl550, Not 450, But Didn't See An Option For It. Any Suggestions On How To Check Power To The Sensors...