RAM Promaster City 2015 — technical service bulletin
Bulletin 21-039-15 REV-A · NHTSA communication 10148984 · issued Aug 22, 2015
Technical service bulletin
communication type
Power Train
component
2015
model years
1
vehicle entries
Official summary
Flash: Transmission Shift And Drivability Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs). ? P1720 - Output Speed Sensor-Wheel Speed Rationality. ? P1634 - Output Speed Sensor-Wheel Speed Rationality. ? P1DCCD - TCM Monitoring Processor Performance Multiple Clutches Locked Up. ? P0887 - TCM Power Control Circuit High.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.