P0456 on Hyundai vehicles A very small leak in the evaporative emissions system

A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.

Bulletins and campaigns Hyundai filed with NHTSA whose summary names P0456. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• 19-01-030H Service bulletin
  2019-10-28 · Engine And Engine Cooling
• "Certain 2017-2019 vehicles may experience check engine light “ON” with the following DTC stored: DTC P0456 - Evaporative System (EVAP) - Very Small LeakThese conditions primarily occur in the California coastal areas that are subject to marine layer cloud cover. Salt particulate deposit can form inside the Natural Vacuum Leak Detection (NVLD) which may cause intermittent operation prompting the
• Campaign T4C Dea Service bulletin
  2019-10-28 · Engine And Engine Cooling
• Hyundai is conducting a Service Campaign to install a new Air Filter Kit with an updated filter to help prevent DTC P0456 on certain 2017-2019 Ioniq (AE) HEV vehicles.
• 19-01-030H Service bulletin
  2019-10-28 · Engine
• Certain 2017-2019 vehicles may experience check engine light ?ON? with the following DTC stored: ? DTC P0456 - Evaporative System (EVAP) - Very Small LeakThese conditions primarily occur in the California coastal areas that are subject to marine layer cloud cover. Salt particulate deposit can form inside the Natural Vacuum Leak Detection (NVLD) which may cause intermittent operation prompting the
• 20-01-005H(1) Service bulletin
  2020-02-11 · Electrical System
• This bulletin provides information related to an Electronic Control Module (ECM) software update to revise the logic for DTC P0456: EVAP System Leakage Detected Very Small Leak.
• Campaign T4N Dea Service bulletin
  2020-02-11 · Engine And Engine Cooling
• This service campaign provides information related to an ECM software update to revise the logic for DTC P0456: EVAP System Leakage Detected Very Small Leak.
• 20-01-027H Service bulletin
  2020-06-22 · Engine And Engine Cooling
• This bulletin provides information related to an Electronic Control Module (ECM) software update to revise the logic for DTC P030X: Cylinder “X” Misfire Detected and P0456: EVAP System Leakage Detected – Very Small Leak.
• 20-01-020H Service bulletin
  2020-05-11 · Engine And Engine Cooling
• Certain 2016-2019 Sonata Hybrid (LF HEV) may experience check engine light illumination with DTC P0456 - Evaporative System (EVAP) - Very Small Leak stored. These conditions primarily occur in the California coastal areas that are subject to marine layer cloud cover. Salt particulate deposit can form inside the Natural Vacuum Leak Detection (NVLD) sensor which may cause intermittent operation pro
• 20-FL-003H Service bulletin
  2020-05-11 · Engine And Engine Cooling
• Certain 2016-2019 Sonata Hybrid (LF HEV) vehicles may experience check engine light illumination with DTC P0456 - Evaporative System (EVAP) - Very Small Leak stored. Salt particulate deposit can form inside the Natural Vacuum Leak Detection (NVLD) sensor which may cause intermittent operation prompting the DTC P0456 and check engine light. This bulletin provides the procedure to replace the NVLD
• 5NP-Z2J3V-04 Service bulletin
  2017-03-09 · Engine
• Some Veloster (FS) and Sonata Hybrid (YF HEV) vehicles may experience a check engine warning light ON with any of the following DTCs found stored: ? P0442 - Evaporative System (EVAP) - Small Leak ? P0455 - Evaporative System (EVAP) - Large Leak ? P0456 - Evaporative System (EVAP) - Very Small Leak
• 5NPU7G9E02 Service bulletin
  2017-01-24 · Equipment — Other — Owners/Service/Other Manual
• Some Veloster (FS) and Sonata Hybrid (YF HEV) vehicles may experience a check engine warning light ON with any of the following DTCs found stored: ? P0442 - Evaporative System (EVAP) - Small Leak ? P0455 - Evaporative System (EVAP) - Large Leak ? P0456 - Evaporative System (EVAP) - Very Small Leak This bulletin provides the service procedure to inspect vehicles for a potential crack found at t
• 5NP-Q7J2C-07 Service bulletin
  2018-06-21 · Engine And Engine Cooling — Exhaust System
• Certain 2012-2016 1.6L VELOSTER (FS) vehicles may experience a check engine warning light with the following DTC(s) found stored in the Engine Control Module (ECM): ? DTC P0455 - Evaporative emission system-Leak detected (Large leak) ? DTC P0456 - Evaporative System (EVAP) - Very Small Leak ? DTC P0449 - Canister Closed Valve (CCV) - Restricted Vent Circuit ? DTC P0451 - Fuel Tank PSI Sensor (
• 5NP-R8G4T-07 Service bulletin
  2018-06-07 · Engine And Engine Cooling — Exhaust System
• Certain 2012-2016 1.6L VELOSTER (FS) vehicles may experience a check engine warning light with the following DTC(s) found stored in the Engine Control Module (ECM): ? DTC P0455 - Evaporative emission system-Leak detected (Large leak) ? DTC P0456 - Evaporative System (EVAP) - Very Small Leak ? DTC P0449 - Canister Closed Valve (CCV) - Restricted Vent Circuit ? DTC P0451 - Fuel Tank PSI Sensor (

A stored code names the test that failed, never the part that caused it. The record above is what Hyundai and its owners have filed about it; the code’s page across every make has the whole file.