Service bulletin 21-011-20
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10173368 |
| Published by NHTSA | 2020-04-06 |
| Manufacturer's number | 21-011-20 |
| Manufacturer's date | 2020-02-15 |
| NHTSA component | POWER TRAIN; ELECTRICAL SYSTEM:SOFTWARE |
NHTSA's summary
Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following DTCs have been set:P1DDE-00 - Ignition Run-Start Input 1-2 Correlation(Sales Code DFR Only). P1DF3-00 - ECU Not Initialized(Sales Code DFR Only). P0456 - EVAP System Small Leak. P0733-00 - Gear 3 Shift Incorrect Ratio (while operating in 4-Lo range). P0716-00 - Input Shaft Speed Sensor 1 Performance. P0721-00 - Output Shaft Speed Sensor Circuit Performance. P1DB6-00 - Vehicle Speed Signal Performance. P1DAB-00 - Vehicle Speed Undetermined. P215C-00 - Output Shaft Speed Wheel Speed Correlation. P0607-00 - ECU Internal Performance. P1DAC-00 - Engine Speed Undetermined. P07BF-00 - Input/Turbine Shaft Speed Sensor 1 Circuit Low. P07C0-00 - Input/Turbine Shaft Speed Sensor 1 Circuit High. P077C-00 - Output Shaft Speed Sensor Circuit Low. P077D-00 - Output Shaft Speed Sensor Circuit High. P177F-00 - Output Shaft Speed Sensor Out Of Range High. P1778-00 - Input-Turbine Shaft Speed Sensor A Out Of Range High. In addition, the following software enhancements are also available:Engine Stop/Start (ESS) Autostart improvements to adapt to Powertrain Control Module (PCM) and Hybrid Control Processor (HCP) changes. Coast-down downshift improvements for 4-3 on slight down hill and light braking. Low pedal kick-down bump improvement on 3-2 and 2-1 downshift. Improve 2-3 upshift at Wide Open Throttle (WOT) in tow/haul mode. Improve 5-6-5 gear hunt after cruise control resume acceleration. Cruise control improvement to help maintain speeds in tow/haul mode up hill. Improve 4-5 gear hunt in tow/haul up hill. Improve 7-8 gear hunt. Improve low speed upshift, stays in a lower gear to long. 1-2 coast-down shift improvements when coming to a stop. Shifter auto-position correction with ignition in RUN/ACC
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Electrical system, Transmission and driveline, Software
Trouble codes named
P0456, P0607, P0716, P0721, P0733, P077C, P077D, P07BF, P07C0, P1778, P177F, P1DAB, P1DAC, P1DB6, P1DDE, P1DF3, P215C
| RAM 1500 | 2019 |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 18V332000 | 2018-05-17. ELECTRICAL SYSTEM:SOFTWARE; VEHICLE SPEED CONTROL:CRUISE CONTROL; ELECTRICAL SYSTEM:WIRING |
|---|
A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.
| ReferenceY40 | 2024-03-18. Service bulletin. Customer Satisfaction Notification Y40 Control Module Software Updates |
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