DTC P2305-00: Ion Sensor No. 2 Circuit Problem: Outline

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC P2305:00 (PCM, SKYACTIV-G) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Ion sensor No. 2 circuit problem
Detection condition	After the engine is started, when the engine speed is 2, 000 rpm or less, the signal input to the PCM from ion sensor No. 2 is in error.
Fail-safe	Not applicable
Possible cause	Cylinder No. 2 misfire Ignition coil/ion sensor No. 2 connector or terminals malfunction F8 15 A fuse malfunction Short to ground in ion sensor No. 2 power supply circuit Open circuit in ion sensor No. 2 power supply circuit Open circuit in ion sensor No. 2 ground circuit Short to ground in ion sensor No. 2 signal circuit PCM connector or terminals malfunction Short to power supply in ion sensor No. 2 signal circuit Open circuit in ion sensor No. 2 signal circuit Ion sensor No. 2 malfunction PCM malfunction
Courtesy of MAZDA MOTORS CORP.