{"nhtsa_id":10121700,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-11-03","date":"2016-07-21","document_id":"18-025-16 REV. A","mfr_campaign":null,"replaces":null,"component":"FUEL SYSTEM, GASOLINE; POWER TRAIN; ELECTRICAL SYSTEM","mfr_system":null,"summary":"Flash: Powertrain Diagnostic And System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with updated software. The customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Code (DTCs): · **P0456 - EVAP System Small Leak (13 MY only).** · U0140 Lost Communication With Body Control Module. Attempting to clear the DTC may be unsuccessful. Other enhancements included in this update: · Improved fuel pump relay operation. · Improved remote start time after key activation. · Improved Automatic Shutdown Relay (ASD) timer calibration.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10121700-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10121700-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10121700","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"fuel-system","name":"Fuel system","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":["P0456","U0140"],"topics":[],"vehicles":[{"make":"JEEP","model":"WRANGLER","year_from":2012,"year_to":2013,"match":"exact","vehicle_ids":["2012_jeep_wrangler","2013_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":[]}