P0456 on the 2014 Audi Q7
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
Nobody has written a description of this code yet.
| A011465 2035519- | 2017-12-14. Service bulletin. Supersedes Technical Service Bulletin Group 01 number 14-58 dated January 14, 2014. The MIL is on. DTCs are stored in the ECM. Drivability is not affected. The leak detection pump (LDP) is a vacuum-driven, ECM-controlled, diaphragm pump. In order for the LDP to operate, the engine must be running and vacuum must be applied to the vacuum switch on the LDP. The LDP pressurizes the EVAP system and monitors any pressure drop within a specified amount of time in order to detect a leak. DTC P0456 or DTC P0442 can be stored due to static or sporadic air leaks in the EVAP system or static or sporadic air leaks in the LDP. |
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| A011458 2035519- | 2017-11-08. Service bulletin. Supersedes Technical Service Bulletin Group 01 number 13-40 dated November 4, 2013. The MIL is on. DTCs are stored in the ECM. Drivability is not affected. The leak detection pump (LDP) is a vacuum-driven, ECM-controlled, diaphragm pump. In order for the LDP to operate, the engine must be running and vacuum must be applied to the vacuum switch on the LDP. The LDP pressurizes the EVAP system and monitors any pressure drop within a specified amount of time in order to detect a leak. DTC P0456 or DTC P0442 can be stored due to either Static or sporadic air leaks in the EVAP system or Static or sporadic air leaks in the LDP. |
| A011340 2035519- | 2017-10-31. Service bulletin. Supersedes Technical Service Bulletin Group 01 number 13-38 dated October 23, 2013. MIL on. DTCs are stored in the engine control module (ECM). Drivability is not affected. The leak detection pump (LDP) is a vacuum-driven, ECM-controlled, diaphragm pump. In order for the LDP to operate, the engine must be running and vacuum must be applied to the vacuum switch on the LDP. The LDP pressurizes the EVAP system and monitors any pressure drop within a specified amount of time in order to detect a leak. DTC P0456 or DTC P0442 can be stored due to static or sporadic air leaks in the EVAP system or static or sporadic air leaks in the LDP. |
| A011651 2040924- | 2017-10-04. Service bulletin. MIL is on due to DTC P0456 (EVAP Emission Contr. Sys. (very small leak) Leak Detected) being stored in the engine control module (ECM), J623 (address word 01). Drivability is not affected. |
| A01165920409242 | 2017-03-01. Service bulletin. THIS TECHNICAL SERVICE BULLETIN EXPLAINS HOW TO PERFORM AN EVAP SYSTEM PRESSURE TEST TO DIAGNOSE DTC P0456. |
5 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.