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Engine Control System - DTC Diagnostics (P0A94 - U129E)
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Troubleshooting
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DTC P2421
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Overview
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DTC P2421: Overview
If the pressure change value of the FTP sensor is lower than a specified value after the EVAP canister vent shut valve is commanded closed during EVAP system purging, the PCM determines an abnormality and stores the DTC.