# Service bulletin 18\-093\-22 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. - Type: Service bulletin - NHTSA id: 10214598 - Published by NHTSA: 2022\-06\-27 - Manufacturer's number: 18\-093\-22 - Manufacturer's date: 2022\-05\-10 - NHTSA component: ELECTRICAL SYSTEM; SERVICE BRAKES, HYDRAULIC; ENGINE AND ENGINE COOLING; FUEL SYSTEM, DIESEL; POWER TRAIN ## NHTSA's 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. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10214598-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10214598-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Brakes, Electrical system, Engine, Fuel system, Transmission and driveline ## Trouble codes named P0299, P0401, P0607, P0755, P0765, P1451, P20EE, P242F, P244A, P2463 ## Vehicles listed - 2021 RAM 2500 - 2021 RAM 3500 ## Recalls for the same vehicles and component - [2023026](/recalls/tc/2023026.md), 2023-02-09: Electrical - [23V060000](/recalls/nhtsa/23V060000.md), 2023-02-09: ELECTRICAL SYSTEM:WIRING:RELAYS/SOLENOIDS - [2022644](/recalls/tc/2022644.md), 2022-11-10: Powertrain - [22V835000](/recalls/nhtsa/22V835000.md), 2022-11-10: POWER TRAIN:AUTOMATIC TRANSMISSION - [2022108](/recalls/tc/2022108.md), 2022-03-11: Brakes - [22V140000](/recalls/nhtsa/22V140000.md), 2022-03-10: ELECTRONIC STABILITY CONTROL \(ESC\); SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE - [2021629](/recalls/tc/2021629.md), 2021-10-14: Electrical - [21V798000](/recalls/nhtsa/21V798000.md), 2021-10-14: ELECTRICAL SYSTEM:WIRING:RELAYS/SOLENOIDS - [2021138](/recalls/tc/2021138.md), 2021-03-11: Electrical - [21V163000](/recalls/nhtsa/21V163000.md), 2021-03-11: ELECTRICAL SYSTEM ## Other bulletins for the same vehicles and component - [9100901](/bulletins/11037344.md), 2026-09-17, Service bulletin: STRUCTURE:BODY; ELECTRICAL SYSTEM. Passive Entry O/S Dr Handle Prior to replacing an inoperative passive entry door handle, perform Star Online S2623000040. - [114254](/bulletins/11036754.md), 2026-09-03, Service bulletin: ENGINE. RADIATOR \- ENGINE COOLING - [114255](/bulletins/11036753.md), 2026-09-03, Service bulletin: ENGINE. RADIATOR \- ENGINE COOLING - [113744](/bulletins/11035981.md), 2026-08-06, Service bulletin: ENGINE; ELECTRICAL SYSTEM. SENSOR \- TURBOCHARGER SPEED - [113742](/bulletins/11035980.md), 2026-08-06, Service bulletin: ENGINE; ELECTRICAL SYSTEM. SENSOR \- TURBOCHARGER SPEED - [113069](/bulletins/11034910.md), 2026-07-08, Service bulletin: STRUCTURE:BODY; ELECTRICAL SYSTEM. SWITCH – HEADLAMP - [113070](/bulletins/11034909.md), 2026-07-08, Service bulletin: ELECTRICAL SYSTEM; STRUCTURE:BODY. SWITCH – HEADLAMP - [9100841 Rev 1](/bulletins/11034380.md), 2026-07-02, Service bulletin: POWER TRAIN. If customer concern diagnosis leads to suspect u\-joint issue with the prop shaft, u\-joint service kit should be utilized to fix concern. Prop shaft replacement would not be required. - [112906](/bulletins/11034373.md), 2026-07-02, Service bulletin: ENGINE. BEARING \- CRANKSHAFT THRUST and KIT - [9100841](/bulletins/11034338.md), 2026-07-02, Service bulletin: POWER TRAIN. HD Front and Rear Prop Shafts Increase U\-Joint Usage If customer concern diagnosis leads to suspect u\-joint issue or failure with the prop shaft, u\-joint service kit should be utilized to fix concern. Prop shaft replacement would not be required. JSON: [/v1/bulletins/10214598](/v1/bulletins/10214598) [Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%2018-093-22&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10214598&vehicle=Service%20bulletin%2018-093-22)