{"nhtsa_id":10136868,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-05-21","date":"2013-05-25","document_id":"18-023-13","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM","mfr_system":null,"summary":"Flash: Erroneous P0633 - SKIM Secret Key Not Stored in PCM And P0513 - Invalid SKIM Key Previous DTC assignment incorrectly associates the wrong DTC to immobilizer hand-shake failures with the WCM. To correct DTC assignment this bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. An additional code may be present U0168 - Lost Communication With Vehicle Security Control Module. This code is another indicator that there is an issue occurring during the ignition hand shake. Technician may find that the following Diagnostic Trouble Codes have been set: P0633 - SKIM Secret Key Not Stored in PCM P0513 - Invalid SKIM Key U0168 - Lost Communication With Vehicle Security Control Module","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2013/MC-10136868-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2013/MC-10136868-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10136868","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":["P0513","P0633","U0168"],"topics":[],"vehicles":[{"make":"DODGE","model":"CARAVAN","year_from":2012,"year_to":2013,"match":null,"vehicle_ids":[]}],"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":[]}