{"nhtsa_id":10221287,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-09-26","date":"2021-06-19","document_id":"S1918000008RevB","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","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-10221287-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10221287-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10221287","components":[{"id":"engine","name":"Engine","parent":null}],"codes":["P0133","P0137","P0171","P0300","P2096"],"topics":[],"vehicles":[{"make":"JEEP","model":"WRANGLER","year_from":2018,"year_to":2021,"match":"exact","vehicle_ids":["2018_jeep_wrangler","2019_jeep_wrangler","2020_jeep_wrangler","2021_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":[]}