LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Nissan-Datsun >> 2008 >> Quest Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - DTCS U1000 Through P0153 >> DTC P0127 IAT Sensor >> On Board Diagnosis Logic
April 5, 2026: LEMON Manuals is launched! Read the announcement.

On Board Diagnosis Logic

DTC DETECTING CONDITION AND POSSIBLE CAUSE

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0127
0127
Intake air temperature too high Rationally incorrect voltage from the sensor is sent to ECM, compared with the voltage signal from engine coolant temperature sensor.
  • Harness or connectors (The sensor circuit is open or shorted)
  • Intake air temperature sensor