LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1988 (Engine Controls And Fuel - 2.4L - DTC P0010 To DTC P0315) >> DTC P0120, P0122, P0123, P0220, P0222, P0223, or P2135 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, observe the TP sensor 1 voltage parameter. The reading should be between 0.27-4.67 volts and change with accelerator pedal input.
  2. Ignition ON, observe the TP sensor 2 voltage parameter. The reading should be between 0.31-4.7 volts and change with accelerator pedal input.
  3. Observe the TP sensor 1 and 2 parameter. The scan tool should indicate agree.
  4. Clear the DTCs with the scan tool. Operate the vehicle within the Conditions for Running the DTC, or within the conditions that you observed from the Freeze Frame/Failure Records.
  5. Verify that DTC P0120 or P0220 are not the only throttle position DTCs set.
    • If DTC P0120 or P0220 are the only DTCs set, replace the ECM.
  6. Verify that DTCs P0641 or P0651 are set.
scientia non olet · About LEMON Manuals