Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp...

Bulletin number

18-038-26 REV. A

Component

Power train

Summary

Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle exhibit/set SYMPTOM: one or more of the following Diagnostic Trouble Codes (DTCs): ● P219A - Bank 1 Air-Fuel Ratio Imbalance. ● P219B - Bank 2 Air-fuel Ratio Imbalance. ● P032F - Combustion Engine Producing Insufficient Torque. NOTE: This revision has an updated and more effective fix for DTC P219B than the prior version. Customers may experience one or more of the following: ● Power Take Off (PTO) may cancel during engagement with high PTO loads. ● Engine speed surging, unstable, hunting, or oscillating while coasting at low vehicle speeds. ● Stationary Idle PTO feature is not activating when the user configuration is selected to require parking brake be set (DD/DP Only). ● PTO not auto-resuming after hard-wired remote start (DD/DP Only). ● Driveline clunk or bump when coasting to a stop in cruise control mode. ● Engine idle undershoot or delayed response with power steering input. In addition, the following software enhancement(s) is available: ● Increase the duration that PTO related messages are displayed on the Instrument Panel Cluster (IPC) (DD/DP Only). This bulletin involves reprogramming the PCM with the latest available software.

Owners of these vehicles have filed 16 complaints in the transmission category.