{"nhtsa_id":10122179,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-11-08","date":"2014-01-14","document_id":"A011458 2035519-","mfr_campaign":null,"replaces":null,"component":"ENGINE; ELECTRICAL SYSTEM","mfr_system":null,"summary":"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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10122179-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10122179-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10122179","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null}],"codes":["P0442","P0456"],"topics":[],"vehicles":[{"make":"AUDI","model":"Q7","year_from":2013,"year_to":2014,"match":"exact","vehicle_ids":["2013_audi_q7","2014_audi_q7"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}