Diagnosis & Repair

WARNING: This page is about a different car, the 2003 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: These DTCs use two-trip detection logic. Using Toyota hand-held tester or scan tool, read FREEZE FRAME data. Freeze frame data records engine conditions when malfunction is detected.

To minimize time wasted diagnosing EVAP system leaks, it is recommended to perform CONFIRMATION READINESS TEST first in order to verify system monitor "readiness status" and verify DTC is output before proceeding with repair procedure.

For diagnosis and repair procedure with Toyota hand-held tester, see Fig 1-Fig 10 . For diagnosis and repair procedure with generic OBD II scan tool, see Fig 1 and Fig 11-Fig 19 .

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 emission system component locations, see Figure. For circuit wiring diagram, see Fig 20. For vacuum or EVAP hose routing, see VACUUM DIAGRAMS article. For testing of systems or components, see BASIC DIAGNOSTIC PROCEDURES - V6 & V8 article or SYSTEM & COMPONENT TESTING - V6 & V8 article. For removal and installation of components, see REMOVAL & INSTALLATION - V6 & V8 article.

Fig 1: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure (Introduction)

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Fig 2: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure Using Toyota Hand-Held Tester (Steps 1-5)

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Fig 3: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure Using Toyota Hand-Held Tester (Steps 6-9)

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Fig 4: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure Using Toyota Hand-Held Tester (Step 10)

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Fig 5: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure Using Toyota Hand-Held Tester (Steps 11-13)

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Fig 6: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure Using Toyota Hand-Held Tester (Step 14)

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Fig 7: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure Using Toyota Hand-Held Tester (Steps 15-17)

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Fig 8: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure Using Toyota Hand-Held Tester (Steps 18-20)

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Fig 9: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure Using Toyota Hand-Held Tester (Steps 21-22)

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Fig 10: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure Using Toyota Hand-Held Tester (Steps 23-24)

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Fig 11: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure Using OBD II Scan Tool (Steps 1-2)

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Fig 12: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure Using OBD II Scan Tool (Steps 3-5)

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Fig 13: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure Using OBD II Scan Tool (Steps 6-8)

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Fig 14: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure Using OBD II Scan Tool (Steps 9-10)

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Fig 15: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure Using OBD II Scan Tool (Steps 11-12)

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Fig 16: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure Using OBD II Scan Tool (Steps 13-14)

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Fig 17: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure Using OBD II Scan Tool (Steps 15-16)

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Fig 18: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure Using OBD II Scan Tool (Steps 17-18)

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Fig 19: DTCs P0441, P0442, P0446 & P0456 Diagnostic Procedure Using OBD II Scan Tool (Steps 19-20)

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Fig 20: EVAP System Wiring Diagram

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