An aftertreatment system comprises a reductant storage tank and a selective catalytic reduction (SCR) system including a catalyst for reducing constituents of an exhaust gas. A reductant insertion assembly including a pump and dosing valve is fluidly coupled to the pump and the SCR system. A controller is communicatively coupled to the reductant insertion assembly. The controller is configured to initialize the pump so as to pressurize a reductant in the pump. The dosing valve is opened, thereby expelling the reductant into the SCR system. An operating electrical parameter value of the pump is determined which is indicative of an operating pressure of the pump. The controller determines if the operating electrical parameter value exceeds a predetermined operating threshold. If the operating electrical parameter value exceeds the predetermined operating threshold, the controller stops the pump.