{"nhtsa_id":10178693,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-08-24","date":"2020-07-16","document_id":"18-018-20 REV. A","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more ofthe following DTCs: P04FC - Crankcase Ventilation System Performance. P0456 EVAP System Small Leak.If DTC P0456 is present use the wiTECH Small Leak Verification Test (SLVT) to determine if a leak is present in the system. P061A - Level 2 Torque Performance. P0507 - Idle Speed Performance Higher Than Expected. Customers may also describe the following condition:Excessive fan noise when the A/C is on MAX output. Other enhancements included in this update: Electric vacuum pump (EVP) update. Fan noise reduction.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10178693-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10178693-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10178693","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":["P0456","P04FC","P0507","P061A"],"topics":[],"vehicles":[{"make":"JEEP","model":"WRANGLER","year_from":2018,"year_to":2018,"match":"exact","vehicle_ids":["2018_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":[]}