DTC P2237-00: O2 Sensor Positive Current Control Circuit/Open - Bank 1, Sensor 1 [07/2015 - 08/2018]: Contents

DTC No.	Detection Item	DTC Detection Condition	Warning Indicate	Memory	Fail-safe Operation	Note
P223700	O2 Sensor Positive Current Control Circuit/Open - Bank 1, Sensor 1	Open circuit between A/F sensor terminal C6-4 and ECM terminal C27-82	Check engine light: ON Master warning light: OFF Charging system warning light: OFF Engine oil warning light: OFF Wrench warning indicator light: OFF	DTC stored	Applicable	Drive cycle: 2 Monitor item: A/F sensor, HO2S Self test type: CMDTC self test, KOER self test

DETAILS ON DTCS

DTC DETECTION CONDITION	Open circuit between A/F sensor terminal C6-4 and ECM terminal C27-82
	Determination conditions	After A/F sensor activation, a condition in which ECM terminal C27-81 voltage is within the specified range continues for 5 s or more.
	Preconditions	Battery voltage: 11-18 V* The following DTC is not detected: Internal ECM malfunction: P064D00 *: Value can be verified by displaying PIDs using Techstream
	Drive cycle	2
	Self test type	CMDTC self test, KOER self test
	Sensor used	A/F sensor
FAIL-SAFE OPERATION	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.
TROUBLE AREA	A/F sensor connector or terminals malfunction ECM connector or terminals malfunction Open circuit in wiring harness between A/F sensor terminal C6-4 and ECM terminal C27-82 A/F sensor malfunction ECM malfunction