P1127 - Exhaust Temperature Out Of Range, O2 Sensor Tests Not Completed

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P1127 - EXHAUST TEMPERATURE OUT OF RANGE, O2 SENSOR TESTS NOT COMPLETED

Description:	The heated oxygen sensor (HO2S) monitor uses an exhaust temperature model to determine when the HO2S heaters are cycled ON. The test fails when the inferred exhaust temperature is below a minimum calibrated value.
Possible Causes:	Engine not operating long enough prior to carrying out the key on engine running (KOER) self-test Exhaust system too cool
Diagnostic Aids:	Monitor the HO2S heater PIDs to determine their ON/OFF state. DTC P1127 is present if the exhaust is not hot.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	-	refer to PINPOINT TEST DW .	-