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Home >> Isuzu >> 2007 >> Ascender 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 4.2L - DTC P0135 To DTC P0420 >> DTC P0411 >> Circuit/System Verification
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Circuit/System Verification

  1. If any other AIR DTCs are set, perform those diagnostics first.
  2. Engine running, observe that the AIR Pressure Sensor parameter approximately equals BARO.
  3. Engine running, enable the AIR pump with a scan tool and observe that the AIR Pressure Sensor parameter equals approximately 20-25 kPa above BARO.
  4. Engine running, enable the AIR solenoid with a scan tool and observe that the AIR Pressure Sensor parameter equals approximately 8-10 kPa above BARO.
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