Details On DTCs

DTC P0131:00 (PCM, SKYACTIV-G, US) DETECTION CONDITION AND POSSIBLE CAUSE

Description	A/F sensor circuit low input
Detection condition	Determination conditions	Any one of the following conditions is met: Voltage of A/F sensor terminal F is less than specified value Voltage of A/F sensor terminal D is less than specified value Voltage of A/F sensor terminal B is less than specified value
	Preconditions	Switch the ignition ON (engine off or on) Battery voltage: 11-18 V^1 The following DTC is not detected: Internal PCM malfunction: P064D:00 ^1 : Standard can be verified by displaying PIDs using M-MDS
	Drive cycle	2
	Self test type	CM DTC self test, KOER self test
	Sensor used	A/F sensor
Fail-safe function	Fixes duty value of A/F sensor heater Stops fuel feedback control of A/F sensor
Vehicle status when DTCs are output	Not applicable
Possible cause	A/F sensor connector or terminals malfunction PCM connector or terminals malfunction Short to ground in any of the following A/F sensor circuits. Control circuit Signal circuit A/F sensor malfunction PCM malfunction
Courtesy of MAZDA MOTORS CORP.