{"nhtsa_id":10215854,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-07-18","date":"2021-01-16","document_id":"S1918000008 Rev.","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); EQUIPMENT; POWER TRAIN:MANUAL TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)","mfr_system":null,"summary":"Customer?s complaint may include a MIL-on with one or more of the following DTCs (Active, Pending, or Stored) in the PCM: P0133, P0137, P0171, P0300, P2096. The root cause could be due to oil leaking from Bank 1 valve cover seal on to the 1/2 (Bank 1 downstream) O2 sensor. This can adversely affect the 1/2 O2 sensor signal reading and lead to listed DTCs. Before performing normal diagnostic routines for the above codes, check for the condition listed above.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10215854-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10215854-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10215854","components":[{"id":"equipment","name":"Equipment and accessories","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"},{"id":"manual-transmission","name":"Manual transmission","parent":"powertrain"},{"id":"transmission-control-module","name":"Transmission control module","parent":"powertrain"}],"codes":["P0133","P0137","P0171","P0300","P2096"],"topics":[],"vehicles":[{"make":"JEEP","model":"WRANGLER","year_from":2018,"year_to":2020,"match":"exact","vehicle_ids":["2018_jeep_wrangler","2019_jeep_wrangler","2020_jeep_wrangler"]}],"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":[]}