Details On DTCs

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION AND POSSIBLE CAUSE

DESCRIPTION	HO2S circuit low input
DETECTION CONDITION	Determination conditions	A condition in which the HO2S input voltage is less than the specified value continues for the specified period.
	Preconditions	HO2S is activated. The following DTCs are not detected: MAF sensor: P0102:00, P0103:00 ECT sensor: P0117:00, P0118:00
	Malfunction determination period	5 s period
	Drive cycle	2
	Self test type	CMDTC self test
	Sensor used	HO2S
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	Illuminates check engine light.
POSSIBLE CAUSE	HO2S connector or terminals malfunction PCM connector or terminals malfunction Short to ground in wiring harness between HO2S terminal A and PCM terminal 2AI Open circuit in wiring harness between the following terminals: HO2S terminal A-PCM terminal 2AI HO2S terminal B-PCM terminal 2AG HO2S malfunction PCM malfunction