Systems and methods of an on-board NOx monitor reset test

A method, comprising:

• receiving, by a controller, vehicle operation data indicative of a stationary condition for a vehicle having an engine fluidly coupled to an exhaust aftertreatment system;
• causing, by the controller, a speed of the engine to operate in an elevated condition;
• determining, by the controller, an enable condition for a nitrous oxide (NOx) monitor reset process;
• in response to the determined enable condition, receiving, by the controller, a measured system out NOx value;
• estimating, by the controller, a system out NOx amount;
• comparing, by the controller, the measured system out NOx value to the estimated system out NOx amount;
• and
• in response to the comparison, selectively diagnosing, by the controller, the exhaust aftertreatment system as one of a healthy and a degraded exhaust aftertreatment system.

A system, comprising:

• an engine;
• an exhaust aftertreatment system in exhaust gas communication with the engine;
• and
• a controller communicably and operatively coupled to the engine and the exhaust aftertreatment system, wherein the controller is structured to:
• receive vehicle operation data indicative of a stationary condition for a vehicle having the engine and the exhaust aftertreatment system;
• determine an enable condition is satisfied for the engine and exhaust aftertreatment system;
• in response to the determined enable condition, receive system out nitrous oxide (NOx) data indicative of a measured NOx amount exiting the exhaust aftertreatment system;
• estimate a NOx amount exiting the exhaust aftertreatment system;
• compare the measured NOx amount to the estimated NOx amount;
• and
• in response to the comparison, selectively diagnose the exhaust aftertreatment system as one of a healthy and a degraded exhaust aftertreatment system.