DTC P1127: Exhaust Temperature Out Of Range, O2 Sensor Tests Not Completed
WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2010 Mercury Mountaineer, 2010 Mercury Milan, 2010 Mercury Mariner, 2010 Mercury Grand Marquis, and 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
DTC 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: |
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| 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 |
| Escape/Mariner 3.0L, E-Series 4.6L, E-Series 5.4L, Expedition, F-150, Flex, Fusion 3.0L, Milan 3.0L, MKS, MKT, Navigator, Taurus |
- | GO to PINPOINT TEST DZ . | - |
| All others | - | GO to PINPOINT TEST DW . | - |