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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 90 (Engine Control System & Fuel System - 3.7L - DTC P1111 To DTC P2444) >> DTC P2430, P2431, P2432, or P2433 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2007 Isuzu i-370, 2007 GMC Canyon, and 2007 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, verify that the AIR pump is not activated.
  2. Ignition ON, observe that the AIR Pressure Sensor parameter approximately equals BARO.
    • If not equal, verify that the BARO reading is correct for your altitude. Refer to Altitude Versus Barometric Pressure . If the reading is not correct for your altitude, diagnose the manifold absolute pressure (MAP) sensor. Refer to DTC P0106 .
  3. 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.
    • If less than the specified range, verify that the AIR pump is activating. If AIR pump activation is normal, inspect the hoses/pipes between the pump and the AIR solenoid valve for leaks and obstructions.
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