{"nhtsa_id":10177537,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-07-27","date":"2020-06-20","document_id":"18-021-20 REV. A","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)","mfr_system":null,"summary":"Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following DTCs have been set:P012A - Turbocharger/Supercharger Inlet Pressure Sensor 1(APAC, EMEA and LATAM Only). P012C - Turbocharger/Supercharger Inlet Air Pressure Sensor 1 Circuit Low(APAC, EMEA and LATAM Only). P012D - Turbocharger/Supercharger Inlet Air Pressure Sensor 1 Circuit High(APAC, EMEA and LATAM Only). P2C90 - Crankcase Ventilation System - Hose \"A\" Disconnected(APAC, EMEA and LATAM Only). P06EF - Engine Restart Performance. P04FC - Crankcase Ventilation System Performance. P050B - Cold Start Ignition Timing Performance. P0128 - Thermostat Rationality. P0456 - EVAP System Small Leak. If DTC P0456 is present, use the wiTECH Small Leak Verification Test (SLVT) to determine if there is a leak in the system. The following software enhancement is also available in this update:Enable soot retention for vehicles equipped with Gasoline Particulate Filter (GPF). Technicians may also experience the following:Unable to read data information from the OBD II connector when using a generic scan tool(APAC Only).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10177537-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10177537-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10177537","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"},{"id":"transmission-control-module","name":"Transmission control module","parent":"powertrain"}],"codes":["P0128","P012A","P012C","P012D","P0456","P04FC","P050B","P06EF","P2C90"],"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":[]}