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Home › Acura › 2021 › TLX Base › Repair and Diagnosis › Engine Performance › System › Engine Control System - DTC Diagnostics (3 Of 6) › Troubleshooting › DTC Troubleshooting: P0456(3.0L Engine) › Overview

DTC Troubleshooting: P0456(3.0L Engine): Overview

If the EVAP system cannot be decompressed below the reference pressure, the PCM determines an abnormality and stores the DTC.