DTC P2308-00: Ion Sensor No. 3: Circuit Problem

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P2308:00 (PCM - VIN Y) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Ion sensor No. 3: circuit problem
Detection condition	After the engine is started, when the engine speed is standard or less, the signal input to the PCM from ion sensor No. 3 is in error.
Fail-safe	Not applicable
Possible cause	Cylinder No. 3 misfire (See P0303-00: .) Malfunction in wiring harness (including connector/terminal) between main relay and ignition coil/ion sensor No. 3 (see CIRCUIT INSPECTION .) (see CONNECTOR INSPECTION .) Malfunction in wiring harness (including connector/terminal) between ignition coil/ion sensor No. 3 and PCM (see CIRCUIT INSPECTION .) (see CONNECTOR INSPECTION .) Ion sensor No. 3 malfunction (Refer to ION SENSOR INSPECTION (VIN Y) in the service information.) PCM malfunction (Refer to applicable PCM REMOVAL/INSTALLATION (VIN Y) in the service information.)
Repeatability verification procedure	Clear the DTC recorded in the memory. (see CLEARING DTC .) Perform the KOER self test. (See DTC INSPECTION .)
Courtesy of MAZDA MOTORS CORP.
1	Battery
2	Main relay
3	Ignition coil/ion sensor No. 3
4	PCM