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Service bulletins for the 2018 Ram 4500

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.

374 on file from NHTSA, as of 2026-10-19.

About P229F on the 2018 Ram 4500: what the code means, and the bulletins and recalls about the same components.

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Only bulletins with trouble code: P229F are shown. Show all

Bulletins, newest first
18131222023-01-17. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the 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 DTCs have been set: P064F - Unauthorized Software/Calibration Detected. P229F - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 2. P207F - Reductant Quality Performance. P249E - Closed Loop Scr Reductant Injection Control At Limit - Flow Too High. P2509 - PCM/PCM Power Input Signal Intermittent. P0128 - Thermostat Rationality. P2201 - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 1. In addition, the following software enhancements are also available:Scan Tool Fan Actuation Test fix. Enabling DTC P208B - Reductant Pump 1 Control Performance. Mass Air Flow (MAF) Sensor Out Of Range (OOR) low calibration. Idle based misfire retune. Abort timer for Selective Catalytic Reduction (SCR) Out NOx Sensor missing change to 70 seconds. Map SCR missing DTC/Fault (P1C54) to tampering inducement. Particulate Matter (PM) Sensor False Fault Improvement. CC inner loop used up faults. Ultrasonic Flow Meter (UFM) test results fix. Engine run state idle unstable software fix. Ability to write Engine Serial Number (ESN) through wiTECH. Add Diesel Exhaust Fluid (DEF)/Reagent type as a readable value in wiTECH. Fan actuation test. SCR missing tuning capability improvement. Smart tampering improvement.
18131222022-10-17. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the 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 DTCs have been set: P064F - Unauthorized Software/Calibration Detected. P229F - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 2. P207F - Reductant Quality Performance. P249E - Closed Loop Scr Reductant Injection Control At Limit - Flow Too High. P2509 - PCM/PCM Power Input Signal Intermittent. P0128 - Thermostat Rationality. P2201 - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 1. In addition, the following software enhancements are also available:Scan Tool Fan Actuation Test fix. Enabling DTC P208B - Reductant Pump 1 Control Performance. Mass Air Flow (MAF) Sensor Out Of Range (OOR) low calibration. Idle based misfire retune. Abort timer for Selective Catalytic Reduction (SCR) Out NOx Sensor missing change to 70 seconds. Map SCR missing DTC/Fault (P1C54) to tampering inducement. Particulate Matter (PM) Sensor False Fault Improvement. CC inner loop used up faults. Ultrasonic Flow Meter (UFM) test results fix. Engine run state idle unstable software fix. Ability to write Engine Serial Number (ESN) through wiTECH. Add Diesel Exhaust Fluid (DEF)/Reagent type as a readable value in wiTECH. Fan actuation test. SCR missing tuning capability improvement. Smart tampering improvement.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.