{"vehicle":{"id":"2012_toyota_prius","year":2012,"make":"Toyota","model":"PRIUS"},"code":"P0171","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":2,"bulletins":[{"nhtsa_id":10111294,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-08-14","date":"2015-06-30","document_id":"T-SB-0041-15","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)","summary":"TSB: Some 2010 - 2013 model year Prius and 2012 - 2013 model year Prius V vehicles may exhibit a MIL \"ON\" condition with Diagnostic Trouble Code(s) (DTCs) P0A0F (Engine Failed to Start), caused by Purge VSV/PCV line separation from the throttle body housing. One or more of the following DTCs may also set: * P3190 (Poor Engine Power) * P3191 (Engine Does NOT Start) * P0171 (System Too Lean [Bank One]) Replace the Purge VSV (Vacuum Switching Valve Assembly) and reprogram the Engine Control Module/ECM (SAE term: Powertrain Control Module/PCM) with the latest calibration to address this condition.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10111294-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10111294-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10111294"},{"nhtsa_id":10111144,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-08-14","date":"2015-06-30","document_id":"T-SB-0041-15","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)","summary":"TSB: Some 2010 - 2013 model year Prius and 2012 - 2013 model year Prius V vehicles may exhibit a MIL \"ON\" condition with Diagnostic Trouble Code(s) (DTCs) P0A0F (Engine Failed to Start), caused by Purge VSV/PCV line separation from the throttle body housing. One or more of the following DTCs may also set: * P3190 (Poor Engine Power) * P3191 (Engine Does NOT Start) * P0171 (System Too Lean [Bank One]) Replace the Purge VSV (Vacuum Switching Valve Assembly) and reprogram the Engine Control Module/ECM (SAE term: Powertrain Control Module/PCM) with the latest calibration to address this condition.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10111144-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10111144-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10111144"}],"url":"https://open.wenmarpro.com/makes/toyota/prius/2012/bulletins?code=P0171"},"related":{"components":[],"bulletins":[],"recalls":{"may_apply":true,"recalls":[],"lookup":{"nhtsa":"https://www.nhtsa.gov/recalls","tc":"https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng","maker":null}}},"url":"https://open.wenmarpro.com/makes/toyota/prius/2012/codes/P0171","note":"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.","attribution":["Contains information licensed under the Open Government Licence – Canada."]}