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Home >> Saturn >> 2000 >> LS2 Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0445: EVAP Purge Valve Control Circuit Shorted >> Diagnostic Procedures

Diagnostic Procedures

  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD system check, go to next step.
  2. Turn ignition on, with engine off. Using scan tool, command EVAP purge solenoid on. If solenoid clicks when commanded on, problem is intermittent. See DIAGNOSTIC AIDS . If solenoid does not click when commanded on, go to next step.
  3. Disconnect EVAP purge solenoid harness connector. Connect a test light between solenoid harness 2-pin connector terminals. Using scan tool, command EVAP purge solenoid on. If test light turns on, replace EVAP purge solenoid. If test light does not turn on, go to next step.
    4. NOTE: A voltage reading of 2-4 volts in this circuit is normal.
  4. Check for short to voltage in Dark Green wire between solenoid and ECM. Repair as necessary. If circuit is okay, replace ECM.
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