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Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 690 (Engine Controls And Fuel - 2.2L (L61) - DTC P0016 To DTC P0418) >> DTC P0030, P0036, P0053, P0054, P0135, or P0141 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the sensor.
  2. Ignition ON, connect a test lamp between the HO2S heater voltage supply circuit and ground. The lamp should illuminate.
    • If the lamp does not illuminate, test the voltage supply circuit for and open/high resistance or a short to ground.
    • If the circuit tests normal and its fuse is open, replace the HO2S.
  3. Ignition OFF, connect a test lamp between the HO2S low control circuit and battery voltage. The lamp should not illuminate.
    • If the lamp illuminates, test the low control circuit for a short to ground. If the circuit tests normal, replace the control module.
  4. Engine running, leave the test lamp connected from the previous step. The lamp should flash or be ON steady.
    • If the test lamp is not on steady or flashing, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the control module.
  5. Ignition OFF, install a 30A fused jumper wire from the heater supply circuit terminal to the heater control circuit terminal.
  6. Engine running, observe with a scan tool that the Heater parameter indicates 0.0A.
    • If more than the specified value, test the heater voltage supply and control circuits for resistance greater than 3 ohms. If the circuits test normal, replace the control module.
  7. If the control module and all circuits test normal, replace the HO2S.
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