P0410 and P1153 codes on 2002 WS6
For the P0410 code:
CONDITIONS FOR SETTING THE DTC
If the AIR pump turns ON during a closed loop operation and the HO2S voltage does not fall below 222 mV for 1.3 seconds .
Or
If the AIR pump turns ON during a closed loop operation and the short-term fuel trim does not change more than a predetermined amount.
For the 1153 code:
CONDITIONS FOR RUNNING THE DTC
DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0121, P0122, P0123, P0125, P0128, P0131, P0132, P0134, P0135, P0151, P0152, P0154, P0155, P0200, P0300, P0410, P0440, P0442, P0446, P0452, P0453, P1258, P1415, P1416, or P1441 are not set.
The loop status is Closed.
The engine run time is more than 160 seconds .
The engine speed is between 1,000-2,300 RPM .
The ignition 1 signal is between 9-18 volts .
The engine coolant temperature (ECT) is more than 50°C (122°F ).
The evaporative emissions (EVAP) purge solenoid is more than 0 percent .
The mass air flow (MAF) is between 20-50 g/s .
The throttle position (TP) is more than 5 percent .
The fuel tank level remaining is more than 10 percent .
The above conditions are met for 60 seconds .
CONDITIONS FOR SETTING THE DTC
The HO2S lean to rich and rich to lean switches are less than a calibrated amount.
I would guess it sets this code first because if P0410 sets it supposedly doesn't run this diag. This would also be the passenger side O2 that isn't switching enough. Again inspect for exhaust leaks where the cats were replaced. Or if you know someone with tuning ability you could have the codes disabled.





