{"nhtsa_id":10156049,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2019-04-01","date":"2012-10-26","document_id":"TT 87-12-02","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT:APPLIANCE:AIR CONDITIONER","mfr_system":null,"summary":"Tech Tips (A/C Shuts Off with ?Compressor Off? Code 12 When Coming to a Stop): This document informs when diagnosing a customer concern of A/C shutting off, with ?compressor off? code 12 when coming to or at a stop, be aware that the ECM strategy is to shut off the A/C compressor to reduce engine load and increase engine vacuum during braking, particularly during the catalyst warm-up phase. A compressor off code of 12 does not necessarily indicate a vehicle concern.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2012/MC-10156049-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2012/MC-10156049-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10156049","components":[{"id":"equipment","name":"Equipment and accessories","parent":null},{"id":"hvac","name":"Heating and air conditioning","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"VOLKSWAGEN","model":"JETTA","year_from":2012,"year_to":2013,"match":"exact","vehicle_ids":["2012_volkswagen_jetta","2013_volkswagen_jetta"]}],"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":[]}