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Diagnostic Procedures

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform diagnostic system check - engine controls. See DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM. After performing diagnostic system check - engine controls, go to next step.
  2. Attempt to start the engine. Does the engine start and run? If yes, go to next step. If no, go to step  4.
  3. Observe the Freeze Frame/Failure Records for this DTC. Turn ignition off for 30 seconds. Start engine. Operate the vehicle within the Conditions for Running the DTC. See CONDITIONS FOR RUNNING DTC . You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition cycle? If yes, go to next step. If no, problem is intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES - 2.2L & 3.0L VUE article.
  4. Test CKP sensor signal circuit of the CKP sensor for an intermittent condition. Did you find and correct the condition? If yes, go to step  11. If no, go to next step.
  5. Test low reference circuit of the CKP sensor for an intermittent condition. Did you find and correct the condition? If yes, go to step  11. If no, go to next step.
  6. Test for an intermittent and poor connection at the ECM. Did you find and correct the condition? If yes, go to step  11. If no, go to next step.
  7. Test for an intermittent and poor connection at the CKP sensor. Did you find and correct the condition? If yes, go to step  11. If no, go to next step.
  8. Remove the CKP sensor. Visually inspect the CKP sensor for physical damage, loose or improper installation, or wiring routed too closely to secondary ignition components. The following conditions may cause this DTC to set: Excessive air gap between the CKP sensor and the reluctor wheel, electromagnetic interference in the CKP sensor circuits, foreign material passing between the CKP sensor and the reluctor wheel, or insufficient fuel. Did you find and correct the condition? If yes, go to step  11. If no, go to next step.
  9. Visually inspect the CKP sensor reluctor wheel for physical damage, excessiveness end play or looseness. Did you find and correct the condition? If yes, go to step  11. If no, go to next step.
  10. Replace CKP sensor. After replacing sensor, go to next step.
  11. Using scan tool, clear DTCs. Turn ignition off for 30 seconds. Operate vehicle within the conditions for running the DTC. See CONDITIONS FOR RUNNING DTC . You may also operate vehicle within the conditions observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition? If yes, go to step  2. If no, go to next step.
  12. With a scan tool, observe the stored information, Capture Info. Does the scan tool display any DTCs that you have not diagnosed? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay.
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