Service bulletin 18-093-15

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.

NHTSA's summary

Flash: MIL Illumination With Transmission And Driveability Improvements This bulletin involves flash reprogramming the Powertrain Control Module (PCM) with new software. The customer may experience a MIL illumination. Upon further investigation the technician may find that any of the following erroneous Diagnostic Trouble Codes (DTCs): ? U0140 - Lost Communication With Body Control Module. 2010 DJ 5.7L (Sales Code EZC) Attempting to clear this DTC will be unsuccessful. ? P050D - Cold Start Rough Idle. ? P2181 - Cooling System Performance has been set. ? P0935 - Line Pressure Sensor Circuit High. All RFE transmissions. P0300 through P0308 - Multiple and Single Cylinder Misfire. This condition can occur when the vehicle is started cold and the driver immediately places the vehicle in drive and applies heavy throttle. Driveability and Transmission improvements are also included with this software release. These changes consist of the following: ? Enhanced clutch protection for more robust torque management during repeated fore and aft movement (rocking vehicle). All engines. ? A revised torque convertor lockup schedule that will reduce transmission temperatures in Tow/Cruise mode. All models equipped with RFE transmission. ? A Clunk sound or feel a shudder when the cruise control resume switch is pressed. This condition is most noticeable after the brakes were pressed to cancel cruise control and then the resume switch is pressed. All models equipped with RFE transmission. ? A shudder or shaking feeling when a wide open throttle (WOT) event is performed by the customer. This is most noticeable after the transmission downshifts during the WOT event. This condition will stop once the transmission upshifts. All models equipped with RFE transmission. ? A shudder or shaking feeling when accelerating from a stop under moderate throttle. This condition will stop once the transmission upshifts. All models equipped with RFE transmission.

The document

• NHTSA's copy of the document (PDF)
• If that address does not open, try this one

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

Brakes, Electrical system, Engine, Transmission and driveline

Trouble codes named

P0300, P0308, P050D, P0935, P2181, U0140

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

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

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