Abnormal quotient of integrated deviation of ignition angle efficiency setpoint and actual ignition angle efficiency during catalyst heating active and accumulated time spent in idle speed is detected, PCM sets DTC P050B.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Ignition efficiency Monitoring during catalyst heating | 1. Poor Connector Connection 2. Incorrect Valve Timing 3. Defected Oil Control Valve 4. Defected Cam Phaser 5. Defected Intake CVVT Assembly |
Enable Conditions |
•
Catalyst heating - Engine speed increase active
•
Engine Coolant Temp. at start higher than 14℉(10℃) and lower than 91.4℉(33℃)
•
5 sec. after engine start
•
Vehicle speed lower than 1.9mph(3 km/h)
•
Pedal value less than 0.01%(pedal sensor 1 voltage 0.859V, not pushed at all)
•
Catalyst heating ignition efficiency set point less than 1.0
•
5 sec. of accumulated diagnostic time | |
Threshold Value |
•
Ignition Angle Efficiency Quotient more than 0.2 | |
Diagnostic Time |
•
20 sec. | |
Mil On Condition |
•
2 Driving Cycle |
