DTC P0456 - EVAP System Leak Detected (Very Small Leak)
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DTC DESCRIPTION P0456 - EVAP SYSTEM LEAK DETECTED (VERY SMALL LEAK)
| Description: | This DTC sets when a very small fuel vapor leak is detected by the engine off natural vacuum (EONV) leak check monitor. Refer to EVAPORATIVE EMISSION (EVAP) LEAK CHECK MONITOR , Engine Off Natural Vacuum (EONV) Leak Check Monitor for additional information. | ||
| Possible Causes: |
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| Diagnostic Aids: | Check for a missing fuel filler cap or the integrity of the cap (if equipped). Verify the capless fuel tank filler pipe is sealed correctly (if equipped). Install and remove the supplemental fueling adapter five times in the capless fuel tank filler pipe to clear debris on the seal. Refer to the
Owner Literature for the location of the supplemental fueling adapter in the vehicle. Check for loose or damaged vapor hoses. Visually inspect the EVAP canister inlet port, EVAP canister vent valve filter, and EVAP canister vent hose assembly for contamination or debris. |
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| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST HX . | ||