# Service bulletin 18\-012\-15

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: 10144819
- Published by NHTSA: 2018\-09\-24
- Manufacturer's number: 18\-012\-15
- Manufacturer's date: 2015\-02\-06
- NHTSA component: FUEL SYSTEM, GASOLINE; ENGINE

## NHTSA's summary

Flash: 6.7L Diagnostic And System Improvements This bulletin involves reprogramming the Engine Control Module \(ECM\) with the latest available software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo diesel. Improvements To Prevent Or Reduce Malfunction Indicator Lamp \(MIL\) Illumination When No Defect Is Present For The Following Diagnostic Trouble Codes \(DTCs\): ? U3017 \- Control Module Timer/Clock Performance. ? U1421 \- Implausible Ignition Key Off Time Received. ? P2281 \- Air Leak Between MAF And Throttle Body. Other Software Improvements: ? Fuel Filter Minder calibration changes. ? wiTECH Fuel Pressure Override and Fuel System Run Up test improvements. ? EGR system improvement to help prevent freeze up. ? Diesel Exhaust Fluid \(DEF\) system enhancement during stationary regeneration.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2015/MC-10144819-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2015/MC-10144819-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine, Fuel system

## Trouble codes named

P2281, U1421, U3017

## Vehicles listed

- 2015 RAM 3500
- 2015 RAM 4500

## Recalls for the same vehicles and component

- [2018269](/recalls/tc/2018269.md), 2018-05-17: Engine
- [2017441](/recalls/tc/2017441.md), 2017-09-13: Engine
- [17V562000](/recalls/nhtsa/17V562000.md), 2017-09-12: ENGINE AND ENGINE COOLING:ENGINE:DIESEL

## Other bulletins for the same vehicles and component

- [9100923](/bulletins/11037599.md), 2026-09-30, Service bulletin: ELECTRICAL SYSTEM; ENGINE. AIR CLEANER \- NONE Instruction to Dealers while ordering the PN\# 68137142AD. 1. If the Air Cleaner Assembly is functional and only the MAF Sensor has failed, the dealer should order and replace only the MAF Sensor\(68002441AC\). 2. If the Air Cleaner Assembly has failed and the MAF Sensor remains functional, the dealer should order the new Air Cleaner Assembly PN\(68137142AD\) and reuse the existing MAF Sensor\(68002441AC\) from the failed assembly. 3. If both the Air Cleaner Assembly and the MAF Sensor have failed, the dealer should order both the New Air Cleaner Assembly\(68137142AD\) and the MAF Sensor\(68002441AC\) as separate service parts.
- [112906](/bulletins/11034373.md), 2026-07-02, Service bulletin: ENGINE. BEARING \- CRANKSHAFT THRUST and KIT
- [112906](/bulletins/11034337.md), 2026-07-02, Service bulletin: ENGINE. BEARING \- CRANKSHAFT THRUST and KIT
- [67A Rev 4 Combo](/bulletins/11002737.md), 2024-07-02, Service bulletin: ENGINE. Emission Recall 67A D Truck Engine Calibration
- [67A Rev 3 Combo](/bulletins/11002526.md), 2024-06-28, Service bulletin: ENGINE. EMISSION RECALL 67A D Truck Engine Calibration
- [S1625000004 REV.A](/bulletins/11001020.md), 2024-06-05, Service bulletin: ENGINE; UNKNOWN OR OTHER. On Board Diagnosis \(OBD\) Monitor Readiness Information
- [Reference67A](/bulletins/10251812.md), 2024-03-18, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. Emission Recall 67A D Truck Engine Calibration
- [Reference67A](/bulletins/10248914.md), 2024-01-16, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; ENGINE AND ENGINE COOLING. Emission Recall 67A \- D Truck Engine Calibration
- [Recall06A](/bulletins/10248594.md), 2024-01-08, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. Emissions Recall 06A \- Vehicle Emission Control Information Label
- [Recall06A](/bulletins/10244433.md), 2023-10-30, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; EQUIPMENT:OTHER:LABELS. Emissions Recall 06A \- Vehicle Emission Control Information Label

JSON: [/v1/bulletins/10144819](/v1/bulletins/10144819)

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