DTC P1402 - EGR Valve Position Sensor (EGRS), Open Or Short Circuit: Condition

WARNING: This page is about a different car, the 1997 Mazda Millenia. However, it is still accessible from the selected car via links, so may be relevant.

DTC is set when input voltage from EGR valve position sensor is less than .2 volt or greater than 4.75 volts. Throttle valve is at closed throttle position and engine speed is less than 875. Possible causes are:

EGR valve position sensor malfunction.
Open or short circuit between terminal No. 3A on Powertrain Control Module (PCM) connector and terminal "B" on EGR valve position sensor connector.
Open or short circuit between terminal No. 3R on Powertrain Control Module (PCM) connector and terminal "C" on EGR valve position sensor connector.
Open or short circuit between terminal No. 3AB on Powertrain Control Module (PCM) connector and terminal "A" on EGR valve position sensor connector.