p0073, p0136, p0141, p1000 codes showing on 2005 for fiesta st

Question

Does any one know the cause to the following error codes on an 05 fiesta st
p0073 amblent air temp sensor circuit high input
p0136 heated 02 sensor circuit malfunction , below minimum threshold.
p0141 heated 02 sensor circuit malfunction
p1000 not all obdll systems monitor checks are complete, below minimum threshold. Dtc present at time of request

any ideas of the causes and what needs to be replaced

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Answer 1

P0073 Ambient air temperature sensor high , when ever it is a circuit high , this represent a disconnection either at the sensor or the sensor itself, The ambient is usaully a integrated sensor , Fixing P0073 should satisfy the other 02 sensor code condition. When P0136  is 02 sensor 1, this is upstream P0141 this is 02 this is the downstream, When ever the front 02 sensor code condition appear how ever affected will affect the perfromance of the downstream sensor, Satisfy P0073 only and the 2 , 02 sensor should go back to normal operating condition