Details On DTCs

P2237: 00 (PCM (H3T)) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	A/F sensor system: Open circuit in A/F sensor control circuit
Detection condition	Determination conditions	After A/F sensor activation, the specified period of time has elapsed while the PCM A/F sensor control circuit voltage is within the specified range.
	Preconditions	Battery voltage: 11-18 V 1 The following DTCs are not detected: Internal PCM malfunction: P064D: 00 1: Standard can be verified by displaying PIDs using M-MDS
	Malfunction determination period	5 s period
	Drive cycle	2
	Self test type	CMDTC self test, KOER self test
	Sensor used	A/F sensor
Fail-safe	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	Malfunction in wiring harness (including connector/terminal) between A/F sensor and PCM A/F sensor malfunction PCM malfunction