Position sensorless drive with single current sensor (SD-SCS) is widely utilized in cost-effective applications. The drive performance of saliency-based SD-SCS can be easily deteriorated due to several reasons: inaccurate phase current reconstruction (PCR) and the interference in injected voltages for the PCR and position estimation. Here, this article proposes an enhanced sensorless control strategy employing six-vertex voltage injection for PCR and position estimation. First, the parameter dependency in position estimation is eliminated by using the current derivative measurements at six active vectors. In addition, by modifying the sequence of voltage vectors, the proposed pulsewidth modulation scheme reduces the current ripple caused by the injected voltages. Experimental results verify that the proposed method shows high accuracy of position estimation and significantly reduces the total harmonic distortion of the phase current in SD-SCS, making it comparable to that of a position-sensored drive.