{"nhtsa_id":11035323,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-07-29","date":"2026-07-22","document_id":"18-073-26","mfr_campaign":null,"replaces":null,"component":"ENGINE; POWER TRAIN","mfr_system":null,"summary":"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle exhibit/set SYMPTOM: one or more of the following Diagnostic Trouble Codes (DTCs): ● P0420 - Catalyst System Efficiency Below Threshold Bank 1. ● P0430 - Catalyst System Efficiency Below Threshold Bank 2. ● P0556 - Brake Booster Pressure Sensor Circuit Performance. ● P0340 - Cam Position Sensor Circuit - Bank 1 Intake. ● P0345 - Cam Position Sensor Circuit - Bank 2 Intake. ● P0365 - Cam Position Sensor Circuit - Bank 1 Exhaust. ● P0390 - Cam Position Sensor Circuit - Bank 2 Exhaust. Customers may experience one or more of the following: ● Vehicle fails emissions inspection testing. ● Fuel odor during frequent stop and re-start driving, during high ambient temps. In addition, the following software enhancement(s) is available: ● OBD calibration turned off DTC \"U0463 - Fuel Level Implausible\" message code and will now be detected with DTC \"P0463 - Fuel Level Sensor 1 Circuit High\". ● More robust trailer brake module enhancements for 3rd party aftermarket designs. ● Cam/crank diagnostic has been turned from a 1-trip to a 2-trip MIL. ● Change fuel level legislative reporting from a voltage to a percent scale. This bulletin involves reprogramming the PCM with the latest available software.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11035323-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11035323-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11035323","components":[{"id":"engine","name":"Engine","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":["P0340","P0345","P0365","P0390","P0420","P0430","P0463","P0556","U0463"],"topics":[],"vehicles":[{"make":"RAM","model":"PROMASTER","year_from":2018,"year_to":2019,"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":[]}