18-103-15

Flash: Powertrain Diagnostic And System Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) with updated software. Some customers may describe one or more of the following: MIL Illumination Upon further investigation the technician may find that the following Diagnostic Trouble Codes (DTCs) have been set: ? P2096 - Downstream Fuel Trim System 1 Lean (5.7L Engines). ? P2097 - Downstream Fuel Trim System 1 Rich (5.7L Engines). ? P2098 - Downstream Fuel Trim System 2 Lean (5.7L Engines). ? P2099 - Downstream Fuel Trim System 2 Rich (5.7L Engines). Drivability Improvements: ? Fuel pump relay operation at key on. ? Engine seems to lacks power at high engine RPMs (5.7L and 4.7L Engines). ? Shudder or shake condition on wide open throttle stab during downshift event (5.7L and 4.7L Engines). ? EVAP Diagnostic Enhancements. This diagnostic routine will be disabled while the vehicle is in decel fuel shut off mode.(3.7L/4.7L Engines only). ? Audible knock sound on WOT launches (DJ/DD 5.7L Engines only). Transmission Improvements: ? High engine RPMs needed before vehicle will upshift from 3rd to 4th. (5.7L and 4.7L Engines). ? Harsh 1st to 2nd gear upshift (5.7L and 4.7L Engines). ? Unexpected or busy downshift while coasting between 45-48 mph (72-77 kmh) (DS 5.7L Engines only).