Idle valve signal.
(M) Dual Plug (DPI), SPOUT or IDM circuit fault - Ignition Systems
Error Code :223 To understand the true meaning behind this DTC, let's try and break down its definition, '(M) Dual Plug (DPI), SPOUT or IDM circuit fault - Ignition Systems '. Right off the bat, we can see that this code has to do to with the vehicle's post catalyst fuel trim system, or to be more specific, the fuel itself. In the simplest of terms, this means that your powertrain control module (PCM) has detected via oxygen sensors in the exhaust system.
After removing left rear wheel,found the wire connector of left rear wheel speed sensor is normal,no loosening.And then removed the connector to check the terninal is also normal.Used multimeter to detect the wire it works correctly,no short circuit,it was inferred that the left rear wheel speed sensor was damaged.