{"nhtsa_id":10139648,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-06-11","date":"2014-04-22","document_id":"18-031-14","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"Flash: MIL Illumination P1239- Engine Oil Temperature Too Low. Includes Powertrain System Improvements/Enhancements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find that the following Diagnostic Trouble Code has been set: ? P1239 - Engine Oil Temperature Too Low The following system improvements have also been included in this software release: ? Corrected a generic scan tool display issue regarding Mode 6 data accuracy","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139648-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139648-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10139648","components":[{"id":"engine","name":"Engine","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":["P1239"],"topics":[],"vehicles":[{"make":"JEEP","model":"CHEROKEE","year_from":2014,"year_to":2014,"match":"exact","vehicle_ids":["2014_jeep_cherokee"]}],"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":[]}