P401 is set when ECM detects that duty amount of EEGR actuator contol valve, ENG speed or amount of EGR is exceeded to minimum set point last to more than 15sec. In this case, check that stuck of EEGR actuator, air leakage of intake line.
Item | Detecting Condition | Possible Cause | |
DTC Strategy |
•
Signal monitoring | 1. EEGR actuator stuck 2. EGR gas recirculation line stuck 3. Exhaust system leak 4. Faulty EEGR actuator | |
Enable Conditions |
•
Engine running | ||
Threshold Value |
•
Real air amount value > Target air amound value | ||
Diagnostic Time |
•
15sec | ||
Fail Safe | Fuel Cut |
•
NO | |
EGR Off |
•
YES | ||
Fuel Limit |
•
NO | ||
Check Lamp |
•
YES | ||
