{"vehicle":{"id":"2014_toyota_sequoia","year":2014,"make":"Toyota","model":"Sequoia"},"code":"P0171","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":4,"bulletins":[{"nhtsa_id":10171454,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-02-18","date":"2020-01-23","document_id":"T-SB-0166-19_Rev","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING","summary":"TSB: REVISION NOTICE January 23, 2020 Rev1: G1439 The Parts Information, Calibration Information, and Repair Procedure sections have been updated. SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin No. T-SB-0058-13.Service Bulletin No. T-SB-0058-13 is obsolete and any printed versions should be discarded. Some 2009 ? 2018 model year Sequoia and 2009 ? 2019 model year Tundra vehicles equipped with a 3UR-FBE engine may exhibit a hard start and/or MIL ON condition with one or more of the following Diagnostic Trouble Codes (DTCs): ? DTC P0171 and/or P0174 (System Too Lean Bank 1/Bank 2) ? DTC P0172 and/or P0175 (System Too Rich Bank 1/Bank 2) ? DTC P1604 (Startability Malfunction) Techstream data list analysis may reveal negative fuel trims and an elevated alcohol density estimate relative to the vehicle?s actual fuel alcohol content. Follow the Repair Procedure in this bulletin to address these conditions.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10171454-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10171454-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10171454"},{"nhtsa_id":10170730,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-01-27","date":"2019-12-06","document_id":"T-SB-0166-19","mfr_campaign":null,"component":"EQUIPMENT ADAPTIVE/MOBILITY; ENGINE","summary":"TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin No. T-SB-0058-13. Service Bulletin No. T-SB-0058-13 is obsolete and any printed versions should be discarded. Some 2009 ? 2018 model year Sequoia and 2009 ? 2019 model year Tundra vehicles equipped with a 3UR-FBE engine may exhibit a hard start and/or MIL ON condition with one or more of the following Diagnostic Trouble Codes (DTCs). ? DTC P0171 and/or P0174 (System Too Lean Bank 1/Bank 2) ? DTC P0172 and/or P0175 (System Too Rich Bank 1/Bank 2) ? DTC P1604 (Startability Malfunction) Techstream Data List analysis may reveal negative fuel trims and an elevated alcohol density estimate relative to the vehicle?s actual fuel alcohol content. Follow the Repair Procedure in this bulletin to address this condition.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10170730-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10170730-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10170730"},{"nhtsa_id":10134184,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-04-23","date":"2014-12-11","document_id":"T-SB-0058-13 Rev","mfr_campaign":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE; ELECTRICAL SYSTEM:SOFTWARE","summary":"TSB: Some 2012 ? 2015 model year Sequoia and Tundra vehicles with the 3UR-FBE engine may exhibit a MIL ?ON? condition with Diagnostic Trouble Codes (DTCs) P0171/P0174 (System too Lean Bank 1/Bank 2), P0172/P0175 (System too Rich Bank 1/Bank 2), P1604 (Startability Malfunction), and/or P1605 (Rough Idling) after attempting to start the engine. Alcohol Density Estimate values may be high even though the vehicle was fueled with regular fuel (E0/E10). The Engine Control Module/ECM (SAE term: Powertrain Control Module/PCM) logic has been modified to address this condition. Use the following Repair Procedure to reprogram the ECM (PCM). ©","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10134184-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10134184-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10134184"},{"nhtsa_id":10132332,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-04-02","date":"2014-12-11","document_id":"T-SB-0058-13 Rev","mfr_campaign":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE","summary":"TSB: Some 2012 ? 2015 model year Sequoia and Tundra vehicles with the 3UR-FBE engine may exhibit a MIL ?ON? condition with Diagnostic Trouble Codes (DTCs) P0171/P0174 (System too Lean Bank 1/ Bank 2), P0172/P0175 (System too Rich Bank 1/Bank 2), P1604 (Startability Malfunction), and/or P1605 (Rough Idling) after attempting to start the engine. Alcohol Density Estimate values may be high even though the vehicle was fueled with regular fuel (E0/E10). The Engine Control Module/ECM (SAE term: Powertrain Control Module/PCM) logic has been modified to address this condition. Use the following Repair Procedure to reprogram the ECM (PCM). ©","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10132332-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10132332-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10132332"}],"url":"https://open.wenmarpro.com/makes/toyota/sequoia/2014/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/sequoia/2014/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."]}