# Service bulletin 1804821

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: 10230122
- Published by NHTSA: 2023\-01\-17
- Manufacturer's number: 1804821
- Manufacturer's date: 2021\-05\-15
- NHTSA component: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)

## NHTSA's summary

Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the PCM with the latest available software. The customer may experience the following:LED light in the Start/Stop button will not illuminate when pressed.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10230122-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10230122-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Transmission and driveline, Automatic transmission, Transmission control module

## Vehicles listed

- 2021 RAM 1500

## Recalls for the same vehicles and component

- [23V265000](/recalls/nhtsa/23V265000.md), 2023-04-13: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)

## Other bulletins for the same vehicles and component

- [1808623](/bulletins/10243238.md), 2023-10-02, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM. Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the PCM with the latest available software.
- [9100179](/bulletins/10240962.md), 2023-08-21, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION. Transmission, Valve Body For 2021 DT with concerns related to DTC P0731 \(Gear 1 Shift Incorrect ratio\) contact FCA Redacted Content. If no response in 15 minutes, proceed with order.
- [S2325000004](/bulletins/10236877.md), 2023-05-30, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM. Malfunction Indicator Lamp \(MIL\) Illuminated. Diagnostic Trouble Code \(DTC\) P2047 ? Reductant Injector 1/1 Circuit, Set.
- [1814822](/bulletins/10230547.md), 2023-01-23, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM. Powertrain Control Module \(PCM\) Updates
- [S2225000004](/bulletins/10225993.md), 2022-11-07, Service bulletin: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); UNKNOWN OR OTHER. Customer complaint may include MIL\-On/check engine lamp\-on condition. Upon further inspection, a DTC for P0456\-Small Leak Detected may be set in the PCM.
- [2102021](/bulletins/10223503.md), 2022-10-17, Service bulletin: WHEELS; ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM; STEERING; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); POWER TRAIN. Flash: Transmission Control Module \(TCM\) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience the follwing:Unable to set desired gear manually from the steering wheel controls.
- [2101921](/bulletins/10223502.md), 2022-10-17, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); POWER TRAIN; WHEELS; ELECTRICAL SYSTEM; STEERING; ELECTRICAL SYSTEM:SOFTWARE. Flash: Transmission Control Module \(TCM\) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience the follwing:Unable to set desired gear manually from the steering wheel controls.
- [2101821](/bulletins/10223500.md), 2022-10-17, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM; POWER TRAIN; ELECTRICAL SYSTEM:SOFTWARE. Flash: Transmission Control Module \(TCM\) Updates This bulletin involves reprogramming the TCM with the latest available software. The customer may describe one or more of the following:During a 2 \- 3 transmission upshift, the engine is hitting rev limit. Hesitation feel during a pedal tip in, while engine is warming up below 1 °C \(30 °F\) ambient temp.
- [S2125000002](/bulletins/10221288.md), 2022-09-26, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Customer complaint includes a Mil\-on condition. Upon further investigation, one or more of the following fault codes may be set in the PCM:
- [S2121000001](/bulletins/10220866.md), 2022-09-26, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:CVT. CV Boot Leak Inspection, Boot Inspection

JSON: [/v1/bulletins/10230122](/v1/bulletins/10230122)

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