KOEO/KOER SELF-TEST

• The self-test function consists of the KOEO (Key On, Engine Off) self-test, performed when the ignition switch is turned to the ON position and the engine is stopped, and the KOER (Key On, Engine Running) self-test, performed when idling. If an abnormality is detected when either self-test is executed, a DTC is displayed on the WDS or equivalent. Using the self-test function, the present malfunction or a successful repair is readily confirmed. Refer to the self-test function table for the corresponding DTCs.

KOEO (Key ON, Engine Off) Self-test

• The KOEO self-test is a powertrain control system self-diagnosis, performed when the ignition switch is turned to the ON position and the engine is stopped. A KOEO self-test begins when the connected WDS or equivalent sends an execute command to the PCM.

• As the KOEO self-test is performed, the PCM performs the inspection for set DTCs and if a malfunction is detected the DTC is displayed on the WDS or equivalent.

KOER (Key ON, Engine Running) Self-test

• The KOER self-test is a powertrain control system self-diagnosis, performed when the ignition switch is turned to the ON position and the engine is idling. A KOER self-test begins when the connected WDS or equivalent sends an execute command to the PCM.

• As the KOER self-test is performed, the PCM performs the inspection for set DTCs and if a malfunction is detected the DTC is displayed on the WDS or equivalent.


DTC No.	Condition	Test condition
DTC No.	Condition	KOEO	KOER
P0030	Front HO2S heater control circuit problem	-	×
P0031	Front HO2S heater control circuit low	-	×
P0032	Front HO2S heater control circuit high	-	×
P0037	Rear HO2S heater control circuit low	-	×
P0038	Rear HO2S heater control circuit high	-	×
P0076	VDI solenoid valve control circuit low	×	×
P0077	VDI solenoid valve control circuit high	×	×
P0101	MAF sensor circuit range/performance problem	-	-
P0102	MAF sensor circuit low input	×	×
P0103	MAF sensor circuit high input	×	×
P0107	BARO sensor circuit low input	×	×
P0108	BARO sensor circuit high input	×	×
P0111	IAT sensor circuit range/performance problem	-	-
P0112	IAT sensor circuit low input	×	×
P0113	IAT sensor circuit high input	×	×
P0117	ECT sensor circuit low input	×	×
P0118	ECT sensor circuit high input	×	×
P0122	TP sensor No.1 circuit low input	×	×
P0123	TP sensor No.1 circuit high input	×	×
P0125	Insufficient coolant temperature for closed loop fuel control	-	-
P0130	Front HO2S circuit problem	-	×
P0131	Front HO2S circuit low voltage	-	×
P0132	Front HO2S circuit high voltage	-	×
P0133	Front HO2S circuit slow response	-	-
P0138	Rear HO2S circuit high voltage	-	×
P0139	Rear HO2S circuit slow response	-	×
P0171	System too lean	-	×
P0172	System too rich	-	×
P0222	TP sensor No.2 circuit low input	×	×
P0223	TP sensor No.2 circuit high input	×	×
P0300	Random misfire detected	-	-
P0301	Front rotor misfire detected	-	-
P0302	Rear rotor misfire detected	-	-
P0327	KS circuit low input	×	×
P0328	KS circuit high input	×	×
P0335	Eccentric shaft position sensor circuit problem	-	-
P0336	Eccentric shaft position sensor circuit range/performance problem	-	×
P0410	AIR system problem	-	×
P0420	Catalyst system efficiency below threshold	-	-
P0443	Purge solenoid valve circuit problem	-	×
P0461	Fuel gauge sender unit circuit range/performance problem	-	-
P0462	Fuel gauge sender unit circuit low input	×	×
P0463	Fuel gauge sender unit circuit high input	×	×
P0480	Cooling fan No.1 control circuit problem	×	×
P0481	Cooling fan No.2 control circuit problem	×	×
P0500	VSS circuit problem	-	-
P0505	Idle air control system problem	-	×
P0562	System voltage low (KAM)	×	×
P0564	Cruise control switch input circuit problem	×	×
P0571	Brake switch input circuit problem	×	×
P0601	PCM memory check sum error	×	×
P0602	PCM programming error	×	×
P0604	PCM random access memory error	×	×
P0610	PCM vehicle options error	×	×
P0638	Throttle actuator control circuit range/performance problem	-	-
P0661	SSV solenoid valve control circuit low	×	×
P0662	SSV solenoid valve control circuit high	×	×
P0703	Brake switch No.1 input circuit problem	-	-
P0704	CPP switch input circuit problem	-	-
P0850	Neutral switch input circuit problem	-	-
P1260	Immobilizer system problem	×	-
P1574	TP sensor output incongruent	×	×
P1577	APP sensor output incongruent	×	×
P1686	Metering oil pump control circuit low flow side problem	-	×
P1687	Metering oil pump control circuit high flow side problem	-	×
P1688	Metering oil pump control circuit initial check problem	-	×
P2006	APV motor control circuit IC problem	-	-
P2008	APV motor control circuit/open	×	×
P2096	Target A/F feedback system too lean	-	×
P2097	Target A/F feedback system too rich	-	×
P2101	Drive-by-wire relay control circuit problem	-	-
P2106	Throttle actuator control system-forced limited power	-	-
P2107	Throttle actuator control module processor error	×	×
P2108	Throttle actuator control module performance error	-	-
P2109	TP sensor minimum stop range/performance problem	-	-
P2112	Throttle actuator control system range/performance problem	-	-
P2119	Throttle actuator control throttle body range/performance problem	×	×
P2122	APP sensor No.1 circuit low input	×	×
P2123	APP sensor No.1 circuit high input	×	×
P2127	APP sensor No.2 circuit low input	×	×
P2128	APP sensor No.2 circuit high input	×	×
P2135	TP sensor No.1/No.2 voltage correlation problem	×	×
P2136	TP sensor No.1/No.3 voltage correlation problem	×	×
P2138	APP sensor No.1/No.2 voltage correlation problem	×	×
P2195	Front HO2S signal stuck lean	-	×
P2196	Front HO2S signal stuck rich	-	×
P2257	AIR pump relay control circuit low	×	×
P2258	AIR pump relay control circuit high	×	×
P2259	AIR solenoid valve control circuit low	×	×
P2260	AIR solenoid valve control circuit high	×	×
P2270	Rear HO2S signal stuck lean	-	×
P2271	Rear HO2S signal stuck rich	-	×
P2502	Charging system voltage problem	-	×
P2503	Charging system voltage low	-	×
P2504	Charging system voltage high	-	×