DTC P1499: EGR Valve Solenoid Coil No. 4 Open Or Short: Condition

WARNING: This page is about a different car, the 2002 Mazda Protege5 and 2002 Mazda Protege. However, it is still accessible from the selected car via links, so may be relevant.

DTC is set when PCM detects input voltage from EGR valve coil No. 4 is too low or too high just after turning ignition switch on. This is a diagnostic support DTC, monitored once per ignition key cycle. MIL is not illuminated when PCM detects malfunction. Possible causes are:

EGR valve malfunction.
Open circuit between main relay and EGR valve.
Open or short circuit between PCM and EGR valve.
PCM malfunction.