F 250 4WD Super Duty V10-6.8L VIN S (2001)
Inputs from ECT or CHT (warm engine), IAT (not extreme ambient temperatures), MAF (greater than minimum engine load), VSS (within
vehicle speed widow) and TP (at part-throttle) are required to enable the Catalyst Efficiency Monitor.
2. The DTCs associated with this test are DTC P0420 (Bank 1) and P0430 (Bank 2). Because an Exponentially Weighted Moving Average
algorithm is use for malfunction determination, up to six driving cycles may be required to illuminate the MIL during normal customer driving.
If KAM is reset, a malfunction will illuminate the MIL in 2 drive cycles.
If the catalyst monitor does not complete during a particular driving cycle, the already accumulated switch/signal data is retained in Keep Alive
Memory and is used during the next driving cycle to allow the catalyst monitor a better opportunity to complete.
