Flash: 6.4L Powertrain Diagnostic And System Improvements This bulletin involves reprogramming of the...

Bulletin number

18-020-16

Component

Engine and engine cooling

Summary

Flash: 6.4L Powertrain Diagnostic And System Improvements This bulletin involves reprogramming of the Powertrain Control Module (PCM) with the latest software. Customers may experience one or more of the following symptoms and/or a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs): · P0456 - EVAP System Small Leak. · P2299 - Brake Pedal Position/Accelerator Pedal Position Incompatible. Customers may also notice the following condition(s): · Brief engine idle fluctuation while in hot ambient temperatures. · A slight hesitation during light pedal application after engine cold start. · Driveline noises. · Engine stumble/hesitation on a very hard pedal acceleration from a dead stop. · Transmission enhancements during low speed braking turning maneuvers. · False detonation (spark knock) detected during a wide open throttle (LA) Challenger (Sales Codes ESH with DEC only). In addition, the following software enhancement is available: · Calibration Improvements for non-adaptive cruise control equipped vehicles.

Owners of these vehicles have filed 46 complaints in the engine category.