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Home › Saab › 2006 › 9-7X 4.2i › Repair and Diagnosis › Engine Performance › System › Engine Controls - 4.2L - DTC P0446 To P2120 › DTC P0451 › Circuit/System Verification

Circuit/System Verification

  1. If DTCs P0452, P0453, or P0641 are set, repair those first.
  2. With a scan tool, command the EVAP canister vent solenoid valve closed.
  3. Command the purge solenoid to 30 percent.
  4. Observe the FTP sensor voltage parameter as the vacuum increased to the abort limit.
  5. The voltage should scale smoothly.
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