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DTC P0137-00; Ho2S Circuit Low Input: Notes

NOTE:

To determine the malfunctioning part, proceed with the diagnostics from "Function Inspection Using M-MDS".

Details On DTCs

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 No. 1: 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 2AJ HO2S malfunction PCM malfunction