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Home >> Toyota >> 2003 >> Sienna CE >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self Diagnostics >> Diagnostic Tests >> DTC P0442: EVAP Emission Control System Leak Detected (Small Leak) Or DTC P0456: EVAP Emission Control System Leak Detected (Very Small Leak) >> Diagnosis & Repair
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Diagnosis & Repair

NOTE: Using Toyota hand-held tester or scan tool, read FREEZE FRAME data. Freeze frame data records engine conditions when malfunction is detected.
NOTE: In order to minimize time wasted diagnosing DTCs P0442 &/or P0456, it is recommended to perform Confirmation Readiness Test first to verify EVAP system readiness status and confirmation of DTC. See TEST DRIVE CONFIRMATION .

For diagnosis and repair procedure with Toyota hand-held tester or Enhanced OBD II scan tool, see Fig 1-Fig 9 .

For diagnosis and repair procedure with generic OBD II scan tool, see Fig 10-Fig 18 .

For access to, or replacement of ECM, Engine Control Module (ECM) is located behind glove box. See Figure. For ECM connector view, see Figure. For circuit wiring diagram, see Figure. For vacuum or EVAP hose routing, see Figure & VACUUM DIAGRAMS article. For testing of systems or components, see SYSTEM & COMPONENT TESTING - V6 & V8 article. For removal and installation of components, see REMOVAL & INSTALLATION - V6 & V8 article.

Fig 1: DTCs P0442 & P0456 Diagnostic Procedure Using Hand-Held Tester (Steps 1-3)
G00241787Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: DTCs P0442 & P0456 Diagnostic Procedure Using Hand-Held Tester (Steps 4-6)
G00241788Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 3: DTCs P0442 & P0456 Diagnostic Procedure Using Hand-Held Tester (Steps 7-9)
G00241789Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 4: DTCs P0442 & P0456 Diagnostic Procedure Using Hand-Held Tester (Steps 10-12)
G00241790Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 5: DTCs P0442 & P0456 Diagnostic Procedure Using Hand-Held Tester (Steps 13-15)
G00241791Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 6: DTCs P0442 & P0456 Diagnostic Procedure Using Hand-Held Tester (Steps 16-18)
G00241792Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 7: DTCs P0442 & P0456 Diagnostic Procedure Using Hand-Held Tester (Steps 19-21)
G00241793Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 8: DTCs P0442 & P0456 Diagnostic Procedure Using Hand-Held Tester (Steps 22-23)
G00241794Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 9: DTCs P0442 & P0456 Diagnostic Procedure Using Hand-Held Tester (Steps 24-25)
G00241795Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 10: DTCs P0442 & P0456 Diagnostic Procedure Using OBD II Scan Tool (Steps 1-2)
G00241795Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 11: DTCs P0442 & P0456 Diagnostic Procedure Using OBD II Scan Tool (Steps 3-5)
G00241796Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 12: DTCs P0442 & P0456 Diagnostic Procedure Using OBD II Scan Tool (Steps 6-8)
G00241797Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 13: DTCs P0442 & P0456 Diagnostic Procedure Using OBD II Scan Tool (Steps 9-10)
G00241798Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 14: DTCs P0442 & P0456 Diagnostic Procedure Using OBD II Scan Tool (Steps 11-12)
G00241799Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 15: DTCs P0442 & P0456 Diagnostic Procedure Using OBD II Scan Tool (Steps 13-14)
G00241800Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 16: DTCs P0442 & P0456 Diagnostic Procedure Using OBD II Scan Tool (Steps 15-16)
G00241801Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 17: DTCs P0442 & P0456 Diagnostic Procedure Using OBD II Scan Tool (Steps 17-19)
G00241802Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 18: DTCs P0442 & P0456 Diagnostic Procedure Using OBD II Scan Tool (Steps 20-22)
G00241803Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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