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Home >> Honda >> 2021 >> Insight EX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Advanced Diagnostics (1 Of 2) >> Advanced Diagnostics >> DTC P0128 >> Possible Cause
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Possible Cause

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Thermostat failure
  • Engine coolant temperature (ECT) sensor 1 failure
  • Intake air temperature (IAT) sensor failure
  • Manifold absolute pressure (MAP) sensor failure
  • Crankshaft position (CKP) sensor failure
  • Barometric pressure (BARO) sensor failure
  • Ignition system failure
  • Fuel supply system failure
  • Radiator fan failure
  • Hood opened