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Home >> Saturn >> 2000 >> LS2 Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0443: EVAP Purge Valve Control Circuit >> Diagnostic Procedures
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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. Check ENG CNTL 1 fuse located in underhood fuse block. If fuse is blown, check for grounded circuit (Orange wire) between EVAP purge solenoid and fuse block. Repair as necessary and replace fuse. If fuse is okay or after repairs, go to next step.
  4. 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 and off. If test light turns on and off as commanded, replace EVAP purge solenoid. If test light does not turn on and off as commanded, check for short to ground in Dark Green wire between solenoid and ECM. Repair as necessary. If circuit is okay, replace ECM.
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