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

Bulletin number

18-063-20

Component

Power train: automatic transmission: control module (TCM/PCM/tecm)

Summary

Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following DTCs:P20EE-00 - SCR NOx Catalyst Efficiency Below Threshold Bank 1 Catalyst 1. P24B2-00 - Particulate Matter Sensor Circuit Intermittent. Customers may also describe the following condition:Incorrect vehicle speed reported by the cluster when the driver changes the speed units. Undesirable pedal response in 4-LO mode. Particulate matter (soot) sensor faults codes. Selective Catalytic Reduction (SCR) system fault codes logged at higher vehicle speeds. Alternator load protection at idle. Check Engine Lamp or low battery indicator

Owners of these vehicles have filed 836 complaints in the transmission category.