DTC P2184-00: ECT Sensor No. 2 Circuit Low Input

P2184: 00 (PCM (H3T)) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	ECT sensor No. 2 circuit low input
Detection condition	The PCM monitors the ECT sensor No. 2 signal. If the PCM detects that the ECT sensor No. 2 voltage at the PCM terminal 2BB is standard or less, the PCM determines that the ECT sensor No. 2 circuit has a malfunction.
Fail-safe	Inhibits engine-stop by i-stop control. Inhibits the boost control.
Possible cause	ECT sensor No. 2 malfunction (See PID/DATA MONITOR INSPECTION .) Malfunction in wiring harness (including connector/terminal) between PCM and ECT sensor No. 2 (See CIRCUIT INSPECTION .) (See CONNECTOR INSPECTION .) PCM malfunction (Refer to [PCM REMOVAL/INSTALLATION ] in service information).
Repeatability verification procedure	Clear the DTC recorded in the memory. (See CLEARING DTC .) Perform the KOEO or KOER self test. (See DTC INSPECTION .)
Courtesy of MAZDA MOTORS CORP.
1	PCM
2	ECT sensor No. 2