Diagnosis & Repair

For wiring diagram, see Fig 1. For diagnosis and repair with hand-held tester, see Fig 2-Fig 7 . For diagnosis and repair with OBD II scan tool, see Fig 2 and Fig 8-Fig 11 . For vacuum or EVAP hose routing, see VACUUM DIAGRAMS article. To identify circuits referenced in testing, see ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. To check ECM inputs and outputs, see PIN VOLTAGE CHARTS article. To replace ECM, see ENGINE CONTROL MODULE LOCATION under SELF-DIAGNOSTIC SYSTEM. For removal and installation of components, see REMOVAL & INSTALLATION - 4-CYLINDER article. For testing of components, see SYSTEM & COMPONENT TESTING - 4-CYLINDER article.

Fig 1: DTCs P0441 & P0446 Wiring Diagram

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Fig 2: DTCs P0441 & P0446 Diagnostic Procedure (Using Hand-Held Tester & OBD II Scan Tool, Steps 1-4)

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Fig 3: DTCs P0441 & P0446 Diagnostic Procedure (Using Hand-Held Tester, Steps 5-8)

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Fig 4: DTCs P0441 & P0446 Diagnostic Procedure (Using Hand-Held Tester, Steps 9-12)

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Fig 5: DTCs P0441 & P0446 Diagnostic Procedure (Using Hand-Held Tester, Steps 13-16)

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Fig 6: DTCs P0441 & P0446 Diagnostic Procedure (Using Hand-Held Tester, Steps 17-20)

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Fig 7: DTCs P0441 & P0446 Diagnostic Procedure (Using Hand-Held Tester, Steps 21-24)

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Fig 8: DTCs P0441 & P0446 Diagnostic Procedure (Using OBD II Scan Tool, Steps 5-8)

Fig 9: DTCs P0441 & P0446 Diagnostic Procedure (Using OBD II Scan Tool, Steps 9-11)

Fig 10: DTCs P0441 & P0446 Diagnostic Procedure (Using OBD II Scan Tool, Steps 12-14)

Fig 11: DTCs P0441 & P0446 Diagnostic Procedure (Using OBD II Scan Tool, Steps 15-17)