Method for controlling an exhaust flow in an Exhaust Aftertreatment System (EATS) of a vehicle

A method for controlling an exhaust flow in an Exhaust Aftertreatment System (EATS) of a vehicle, wherein the EATS comprises a NOx sensor and a Selective Catalytic Reduction (SCR) unit, the method comprising:

• monitoring a NOx sensor output parameter from the NOx sensor;
• determining if the NOx sensor output parameter is below a limit;
• when it has been determined that the NOx sensor output parameter is below the limit, determining that a first part of the exhaust flow should bypass at least a first area of the SCR unit and that a second part of the exhaust flow should be inputted to at least the first area of the SCR unit;
• initiating that the first part of the exhaust flow is bypassed at least the first area of the SCR unit and that the second part of the exhaust flow is inputted to at least the first area of the SCR unit;
• when it has been determined that the first part of the exhaust flow should bypass at least the first area of the SCR unit and that the second part of the exhaust flow should be inputted to at least the first area of the SCR unit, determining that reductant should be added to the second part of the exhaust flow before being inputted to at least the first area of the SCR unit;
• and
• initiating addition of the reductant into the second part of the exhaust flow.