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DTC P1127:00: Notes

WARNING: This page is about a different variant/trim than selected.
DTC P1127:00 Exhaust temperature out of range, HO2S tests not completed
DETECTION CONDITION 
  • The 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 CAUSE 
  • Exhaust system too cool
  • Engine not operating long enough prior to carrying out the KOER self-test
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