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Service bulletin 18-042-15

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10159902
Published by NHTSA2019-05-20
Manufacturer's number18-042-15
Manufacturer's date2015-11-04
NHTSA componentELECTRICAL SYSTEM; POWER TRAIN; EQUIPMENT; ENGINE

NHTSA's summary

Flash: 6.4L Diagnostic And System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ? P0300 - Multiple Cylinder Misfire, cold Idle misfire (DJ,D2 or DD vehicles only). ? P030X - Cylinder Misfire (any cylinder) (Additional improvements over the last software update). ? P04D1 - Cooled EGR Temperature Sensor Circuit High. ? P04D0 - Cooled EGR Temperature Sensor Circuit Low. ? P2504 - Charging System Output High. ? P0441 - Evap Purge System Performance. ? P2066 - Fuel Level Sensor 2 Performance. ? P0401 - EGR System Performance (DJ/D2 vehicles only). ? P2096 - Downstream Fuel Trim System 1 Lean (DD/DP vehicles only). ? P2098 - Downstream Fuel Trim System 2 Lean (DD/DP vehicles only). ? P0740 - TCC Out of Range (DD vehicles equipped with a DFP automatic transmission). Customers may also experience any of the following conditions: ? Slightly elevated idle speed noticed during engine warm-up when in Reverse or Drive and when operating in cold ambient temperatures. ? PTO mobile mode cancels or deactivates when vehicle comes to a stop (DD/DP vehicles only). ? Engine cycles in and out of MDS mode too often when operating in PTO stationary mode (DD/DP vehicles only). ? PTO stationary mode cancels or deactivates when PTO up-fit equipment loads fluctuate (DD/DP vehicles only) The following powertrain system improvements/enhancements are also included in this software release: ? Improve Idle at high altitudes (DJ,D2 or DD vehicles only). ? Spark knock on vehicle with low octane fuel (DJ,D2 or DD vehicles only). ? Operator idle speed control enhancements. ? Raise 4x4 low range minimum engine speed from 725 to 800 RPM. ? Raise minimum engine speed to allow MDS activa

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Engine, Equipment and accessories, Transmission and driveline

Trouble codes named

P0300, P0401, P0441, P04D0, P04D1, P0740, P2066, P2096, P2098, P2504

Vehicles listed
RAM 25002014
RAM 35002014
RAM 45002014
RAM 55002014

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20182692018-05-17. Engine
18V3320002018-05-17. ELECTRICAL SYSTEM:SOFTWARE; VEHICLE SPEED CONTROL:CRUISE CONTROL; ELECTRICAL SYSTEM:WIRING
20182302018-05-03. Accessories
20176632017-12-22. Accessories
20176592017-12-21. Powertrain
17V8240002017-12-21. EQUIPMENT
17V8210002017-12-20. POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:COLUMN SHIFT
20174412017-09-13. Engine
17V5620002017-09-12. ENGINE AND ENGINE COOLING:ENGINE:DIESEL
20162142016-05-12. Accessories

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
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