If the PCM determines that the efficiency of the catalyst oxygen storage time has dropped below the 1.2 second threshold, the PCM sets a P0430 DTC.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Manipulates Airfuel and stores the times it takes for the pre and post converter oxygen sensors to switch. | 1. Catalyst Converter |
EnableConditions |
•
No disabling faults present
•
No instrumentation slews active
•
Engine Runtime longer than 580 sec.
•
Purge Concentration Learned
•
Airflow between 3 g/s and 10 g/s
•
Throttle closed less than 1.5%
•
Coolant Temp. between 70°C (158 °F) and 120°C (248 °F)
•
Ambient Temp. between -7°C (19.4 °F) and 105°C (221 °F)
•
Barometer greater than 72 kPa
•
Max number of test attempts less than 12
•
Closed Loop
•
Catalyst Temp. between 250°C (482 °F) and 950°C (1742 °F)
•
Fuel learning completed
•
Vehicle speed less than 3 kph (1.8 mph)
•
Not air fuel ramping
•
Max idle time (about 60 sec.) not exceeded | |
Threshold value |
•
Oxygen Storage Time less than 1.2 sec.. | |
Diagnosis Time |
•
15 sec. | |
MIL On Condition |
•
1 Driving cycle |
