{"nhtsa_id":10128986,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-02-21","date":"2013-03-06","document_id":"18-011-13","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)","mfr_system":null,"summary":"Flash: MIL Illumination P050B and/or Rattle/Clatter Sound on Cold Start-up This bulletin involves installing revised heater hoses, routing the purge solenoid wire harness, and installing revised Powertrain Control Module (PCM) software. Customers may indicate that they hear a clatter or rattle noise coming from the engine on initial start up after a long cold soak. A small number of customers may also experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the following Diagnostic Trouble Code (DTC) has been set. P050B - Cold Start Ignition Timing Performance","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2013/MC-10128986-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2013/MC-10128986-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10128986","components":[{"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":["P050B"],"topics":[],"vehicles":[{"make":"JEEP","model":"COMPASS","year_from":2011,"year_to":2013,"match":"exact","vehicle_ids":["2011_jeep_compass","2012_jeep_compass","2013_jeep_compass"]}],"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":[]}