{"vehicle":{"id":"2021_ram_2500","year":2021,"make":"Ram","model":"2500"},"code":"P1451","generic":false,"description":null,"bulletins":{"as_of":"2026-10-19","count":3,"bulletins":[{"nhtsa_id":10239971,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-07-31","date":"2023-05-24","document_id":"1802423","mfr_campaign":null,"component":"POWER TRAIN; ELECTRICAL SYSTEM","summary":"Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes (DTC)s have been set: ? **P0299 - Turbocharger Underboost.** ? P061B - Internal Control Module Torque Calculation Performance. ? P0755 - Shift Solenoid B (DG7 Only). ? P0765 - Shift Solenoid D (DG7 Only). ? P0401 - EGR System Performance. ? P0755 - 2C Solenoid Circuit. ? P0765 - UD Solenoid Circuit. ? P244A - Diesel Particulate Filter Differential Pressure Too Low. ? P20EE - SCR NOx Catalyst Efficiency Below Threshold - Bank 1. ? P242F - Diesel Particulate Filter Restriction - Ash Accumulation. ? P1451 - Diesel Particulate Filter System Performance. ? P2463 - Diesel Particulate Filter Restriction - Soot Accumulation Bank 1. ? P0607-00 - ECU Internal Performance. ? P0299-00 - Turbocharger Underboost. ? P1451-00 - Diesel Particulate Filter System Performance (Sales Code ETL Only).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10239971-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10239971-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10239971"},{"nhtsa_id":10218562,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-08-22","date":"2021-08-12","document_id":"18-071-21","mfr_campaign":null,"component":"EXTERIOR LIGHTING; FUEL SYSTEM, DIESEL; ELECTRICAL SYSTEM; SERVICE BRAKES, HYDRAULIC; FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE; BACK OVER PREVENTION","summary":"Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/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 Diagnostic Trouble Codes (DTCs) have been set: P0607-00 - ECU Internal Performance. P0299-00 - Turbocharger Underboost. P1451-00 - Diesel Particulate Filter System Performance(ETL Sales Code only). The following improvements are also included in this update: Oil pressure switch modifications. Urea (DEF fliud) level sensor calibration update, to help prevent bumps in DEF level gauge.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10218562-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10218562-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10218562"},{"nhtsa_id":10214598,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-06-27","date":"2022-05-10","document_id":"18-093-22","mfr_campaign":null,"component":"ELECTRICAL SYSTEM; SERVICE BRAKES, HYDRAULIC; ENGINE AND ENGINE COOLING; FUEL SYSTEM, DIESEL; POWER TRAIN","summary":"Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain ControlModule (ECM/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 moreof the following DTCs have been set: P0299 - Turbocharger Underboost. P0401 - EGR System Performance. P0755 - 2C Solenoid Circuit. P0765 - UD Solenoid Circuit. P244A - Diesel Particulate Filter Differential Pressure Too Low. P20EE - SCR NOx Catalyst Efficiency Below Threshold - Bank 1. P242F - Diesel Particulate Filter Restriction - Ash Accumulation. P1451 - Diesel Particulate Filter System Performance. P2463 - Diesel Particulate Filter Restriction - Soot Accumulation Bank 1. P0607-00 - ECU Internal Performance. P0299-00 - Turbocharger Underboost. P1451-00 - Diesel Particulate Filter System Performance(Sales Code ETL Only). In addition, the customer may notice one or more the following conditions: Idle instability. Air handling bump after startup. Harsh shifts during garage shift tip-in. 2-1-2 gear hunting at low speeds, especially on grades. Driveline ?clunk? ?bump? during D-R and R-D GarageShifts. Harsh 5-3 downshift. 2-1 ERS downshift with exhaust brake on, performance improvement. Intermittent shift bump. The following improvements are also included in this update: Fuel System Run-Up Test routine, wiTECH improvement. wiTECH PCM data improvements. wiTECH cylinder cut-out routine, wiTECH improvement. Oil pressure switch modifications. Urea (DEF fluid) level sensor calibration update, to help prevent bumpsin DEF level gauge.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10214598-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10214598-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10214598"}],"url":"https://open.wenmarpro.com/makes/ram/2500/2021/bulletins?code=P1451"},"related":{"components":[],"bulletins":[],"recalls":{"may_apply":true,"recalls":[],"lookup":{"nhtsa":"https://www.nhtsa.gov/recalls","tc":"https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng","maker":null}}},"url":"https://open.wenmarpro.com/makes/ram/2500/2021/codes/P1451","note":"The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.","attribution":["Contains information licensed under the Open Government Licence – Canada."]}