18-081-25

Flash: Powertrain Control Module (PCM) Updates **Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):
• P245D-00 - EGR Cooler Bypass Control Circuit High.
• P02E3-00 - Diesel Intake Air Flow Control Circuit High.
• P0490-00 - EGR Control Circuit High.
• P229F-00 - Aftertreatment NOX Sensor Circuit Performance - Bank 1 Sensor 2.
• P0299-00 - Turbocharger Underboost.
• P242F-00 - Diesel Particulate Filter Restriction - Ash Accumulation.
• P0128-00 - Thermostat Rationality.
• P0234-00 - Turbocharger Overboost Condition.** Customers may also comment on one or more of the following:
• **Engine speed unstable when vehicle is stationary, not in gear and running on high speed governor (max engine speed).**
• Longer crank time than normal.
• Transmission overheat conditions with a message displayed in the Instrument Panel Cluster (IPC) stating "Transmission oil temperature is too hot" This bulletin involves reprogramming the Engine Control Module (ECM/PCM) with the latest available software.