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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 89 (Engine Controls And Fuel - 1.4L (LUJ LUV) - DTC P0010 To DTC P0246) >> Diagnostic Information and Procedures >> DTC P0131, P0132, P0134, P0137, P0138, or P0140: HO2S (LUJ) >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF and all vehicle systems OFF, disconnect the appropriate B52 Heated Oxygen Sensor harness connector. It may take up to 2 minutes for all vehicle systems to power down. Ignition ON.
  2. Test for 1.7-3.0 V between the high signal circuit terminal 4 and ground.
    • If less than 1.7 V. 
    1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module.
    2. Test for the infinite resistance between the high signal circuit terminal 4 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω in the high signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K20 Engine Control Module.
    • If greater than 3 V 
    1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module, ignition ON.
    2. Test for less than 1 V between the high signal circuit terminal 4 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K20 Engine Control Module.
    • If between 1.7-3.0 V 
  3. Verify the scan tool heated oxygen sensor 1 or 2 parameter is between 1.7-3.0 V.
    • If less than 1.7 V 
    1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module, ignition ON.
    2. Test for infinite resistance between the low signal circuit terminal 3 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
    • If infinite resistance, replace the K20 Engine Control Module.
    • If greater than 1.7 V 
  4. Connect a 3 A fused jumper wire between the high signal circuit terminal 4 and the low signal circuit terminal 3.
    5. NOTE:

    The low signal circuit is tied to a pull-up circuit within the engine control module. A voltage of 0.0-1.1 V on the low signal circuit is normal.

  5. Verify the scan tool heated oxygen sensor 1 or 2 voltage parameter displays 0.0 V.
    • If greater than 0.0 V 
    1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module, ignition ON.
    2. Test for less than 2 Ω in the low signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω
    3. Test for less than 1 V between the low signal circuit terminal 3 and ground.
    • If 1 V or greater, repair the short to voltage on the circuit.
    • If less than 1 V, replace the K20 Engine Control Module.
    • If 0.0 V 
  6. Verify none of the conditions listed below exist:
    • If any of the conditions exist 

      Repair as necessary.

    • If none of the conditions exist 
  7. Test or replace the B52 Heated Oxygen Sensor.
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