Patent ID: 8910466

Claim:
A vehicle comprising: an engine producing an exhaust gas; an aftertreatment system for treating the exhaust gas, and including a particulate filter; wherein the particulate filter is configured to regenerate when the exhaust gas is heated above a regeneration temperature; at least one NOx sensor operatively connected to the aftertreatment system and adapted to determine an amount of NOx in the exhaust gas; at least one temperature sensor for sensing a temperature of the exhaust gas; a controller operatively connected to the NOx sensor; wherein the controller is configured to determine whether a predefined number of particulate filter regenerations has occurred; wherein the controller does not enable the NOx sensor when the engine is started until one or more entry conditions are each satisfied; and wherein the one or more entry conditions include a first entry condition, the first entry condition being satisfied when the predefined number of particulate filter regenerations has occurred.