Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with updated...

Bulletin number

18-071-20

Component

Power train

Summary

Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with updated software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) set in the PCM memory:U1424-00 - Implausible Engine Torque Signal Received. In addition, the customer may notice:An unpleasant odor in the vehicle under certain extreme ambient conditions(LD vehicles with Sales Codes EZH with Police Group (Sales Code AHB) or Special Service Group (Sales Code AHV)). The following software enhancements are also available:Reverse gear lock-out change from 16 kph (10 mph) to 4.8 kph (3 mph)(Sales Code EZC with DEC). Change to purge vapor control calibration(Sales Code EZH with DGJ). Oxygen sensor (O2) feedback control changes to improve 3rd gear tip in oscillation at high load(Sales Code EZH with DFK). Calibration update to allow the throttle body to be cycled while the engine is off, for diagnostic purposes. Improved transmission shifting during a limp mode.

Owners of these vehicles have filed 28 complaints in the transmission category.