P0123 is set when the voltage above 4800mV - maximum output voltage of ACV - is detected for more than 1.0 sec. This code is due to short/open in ACV circuit or ACV, ECM.
| Item | Detecting Condition | Possible Cause | ||
| DTC Strategy | 
										•
									 ACV POSITION MONITORING | 
										•
									 ACV circuit 
										•
									 ACV 
										•
									 ECM | ||
| Enable Conditions | 
										•
									 IG KEY "ON" | |||
| Threshold Value | 
										•
									 Output signal below the maximum value.(above 4800mV) | |||
| Diagnostic Time | 
										•
									 1000ms | |||
| Fail Safe | Fuel Cut | NO | ||
| EGR Off | NO | |||
| Fuel Limit | NO | |||
| Check Lamp | NO | |||