# Service bulletin 21\-025\-15 REV\-A

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: 10148955
- Published by NHTSA: 2018\-11\-26
- Manufacturer's number: 21\-025\-15 REV\-A
- Manufacturer's date: 2015\-08\-05
- NHTSA component: POWER TRAIN:AUTOMATIC TRANSMISSION

## NHTSA's summary

Flash: 854RE Transmission Shift Enhancements This bulletin involves reprogramming the Transmission Control Module \(TCM\) with the latest available software. A small number of customers may experience one or more of the following Symptom/Condition\(s\) and/or a Malfunction Indicator Lamp \(MIL\) due to an erroneous Diagnostic Trouble Code \(DTC\): ? P1DCD \- TCM monitoring processor performance multiple clutches locked up. ? P1B13 \- Park\-By\-Wire unintended out of park position. ? P0734 \- Gear 4 Shift Incorrect Ratio set in the TCM memory. ? Bump sensation felt during engine start/stop transition on light throttle acceleration \(Engine Stop Start \(ESS\) equipped vehicles only\). ? Less than desired overall downshifts during normal driving. ? Less than desired downshifts during passing maneuvers. ? Less than desired upshift quality in lower gears.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2015/MC-10148955-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2015/MC-10148955-0001.pdf)

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

## Components

Transmission and driveline, Automatic transmission

## Trouble codes named

P0734, P1B13, P1DCD

## Vehicles listed

- 2015 RAM 1500

## Recalls for the same vehicles and component

- [17V821000](/recalls/nhtsa/17V821000.md), 2017-12-20: POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:COLUMN SHIFT

## Other bulletins for the same vehicles and component

- [S1709000010](/bulletins/10229031.md), 2023-01-09, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Customer complaints may include abnormal engine noise, rough idle, lack of power, misfire. Upon investigation, it may be found that there is excessive camshaft lobe wear/lifter wear \(roller failure\) on one or more cam lobes and that camshaft/lifter replacement is necessary.
- [2102815](/bulletins/10220462.md), 2022-09-26, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION. 8HP70 Tranmission shift enhancements.
- [1800215 REV A](/bulletins/10215108.md), 2022-07-05, Service bulletin: POWER TRAIN:MANUAL TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). This bulletin involves reprogramming the Powertrain Control Module \(PCM\) with updated
- [21\-028\-15](/bulletins/10191433.md), 2021-05-03, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION. 8HP70 Tranmission shift enhancements.
- [S2025000001 Rev.](/bulletins/10184701.md), 2020-12-28, Service bulletin: EXTERIOR LIGHTING; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); EQUIPMENT. \(Rev. B\) Malfunction Indicator Lamp Illumination \(MIL\). Diagnostic Trouble Code \(DTC\) P203E ? Reductant Level Sensor 1 Circuit Intermittent\-Erratic Set.
- [S2025000001 Rev.](/bulletins/10184401.md), 2020-12-21, Service bulletin: ELECTRICAL SYSTEM; FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). \(Rev. B\) Malfunction Indicator Lamp Illumination \(MIL\). Diagnostic Trouble Code \(DTC\) P203E ? Reductant Level Sensor 1 Circuit Intermittent\-Erratic Set.
- [68211004A](/bulletins/10149016.md), 2018-11-26, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION. Shifter \- Automatic Trans Before this part is replaced for any issue please call John Grzecki on cell \(248\) 379\- 0969. If you do not receive a return call within 15 minutes, proceed with the repair. Please be sure to accurately record any DTCs identified with the scan tool and document them on the repair order.
- [21\-037\-15](/bulletins/10148942.md), 2018-11-26, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\); POWER TRAIN:AUTOMATIC TRANSMISSION. Transmission Heater Assembly Reinforcement Plate This bulletin involves verifying the Transmission Heater Assembly build date and if necessary, replacing the Transmission Heater. A small number of customers may notice the presence of transmission fluid in the engine coolant.
- [21\-014\-15](/bulletins/10144828.md), 2018-09-24, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. Flash: 8HP70 Transmission Shift Quality And Drivability Enhancements This bulletin involves reprogramming the Transmission Control Module \(TCM\) with the latest available software A small number of customers may experience one or more of the following conditions. ? Bump sensation during tip\-in acceleration between 5\-10 mph \(8\-16 kph\). ? Less than desired transmission performance during Torque Converter Clutch \(TCC\) lockup. ? Less than desired transmission performance in Tow/Haul mode. ? Less than desired transmission performance during coast down deceleration at higher altitudes. ? Bump sensation during 6\-5 downshift. ? Bump sensation during 1\-2 upshift.
- [9003669](/bulletins/10139980.md), 2018-06-11, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION. Auto Trans Rotary Electronic Shifter The rotary shifter is designed to actuate a motor within the device whenever the driver places their foot on the brake, with the car in Park \(or Neutral\). This generates a noise with each brake press/release. Therefore, even after replacing the shifter for a noise complaint, the replacementpart will also have a characteristic noise generated whenever the driver steps on the brake. Before performing a repair procedure for a noise complaint, please perform a subjective analysis of the noise coming from the rotary shifter. If the shifter noise is deemed abnormal sound \(has an uncharacteristic buzz or grind\), please proceed with normal replacement procedure. If so equipped, record the sound with a handheld microphone, or cell phone, and if noise is above 54dB @ 30cm away from the knob, please proceed with normal replacement procedure. For any further questions, please contact Theodore Kahiya at cell \(519\) 300\-2443.

JSON: [/v1/bulletins/10148955](/v1/bulletins/10148955)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%2021-025-15%20REV-A&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10148955&vehicle=Service%20bulletin%2021-025-15%20REV-A)