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Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 782 (Engine Control System & Fuel System - 2.4L - DTC P0351 To DTC P2544) >> DTC P0506 or P0507 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
  1. If there are any other DTCs set, diagnose those first.
  2. Using a scan tool compare the desired engine idle speed to the actual engine idle speed.
    • Actual engine idle speed should be no greater than 150 RPM below desired.
    • Actual engine idle speed should be no greater than 100 RPM above desired.
  3. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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