{"nhtsa_id":10174233,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-04-27","date":"2020-03-19","document_id":"18-022-20","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; ELECTRICAL SYSTEM","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 of the following DTCs:P06EF - Engine Restart Performance. P050B - Cold Start Ignition Timing 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. P0128 - Thermostat Rationality. P0507 - Idle Speed Performance Higher Than Expected. Customers may also describe the following condition:Excessive radiator fan noise when the A/C is on MAX output. In addition, the following software enhancements are available:Electric Vacuum Pump (EVP) update. Fan noise reduction.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10174233-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10174233-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10174233","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":["P0128","P0456","P0507","P050B","P06EF"],"topics":[],"vehicles":[{"make":"JEEP","model":"WRANGLER","year_from":2019,"year_to":2019,"match":"exact","vehicle_ids":["2019_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":[]}