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Home >> Saturn >> 2002 >> SC2 Automatic, MP6 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0445: EVAP Purge Valve Control Circuit Shorted >> Diagnostic Procedures
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Diagnostic Procedures

  1. Turn ignition on, with engine off. Using scan tool, command EVAP purge solenoid on (PWM 100 percent duty cycle) while monitoring EVAP PURGE - HIGH VOLT test. If scan tool indicates TEST FAIL, go to next step. If scan tool does not indicate TEST FAIL, problem is intermittent. See DIAGNOSTIC AIDS  .
  2. Disconnect EVAP purge solenoid harness connector. Connect a Noid Light (SA9194E) to EVAP purge solenoid harness connector. Using scan tool, command EVAP purge solenoid on (PWM 100 percent duty cycle) and monitor EVAP PURGE - HIGH VOLT test. If scan tool does not indicate TEST PASS, check for short to voltage in EVAP purge solenoid circuit (Dark Green/White wire) to PCM or PCM. If scan tool indicates TEST PASS, replace EVAP purge solenoid.
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