# Service bulletin 0814422

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: 10223813
- Published by NHTSA: 2022\-10\-17
- Manufacturer's number: 0814422
- Manufacturer's date: 2022\-07\-30
- NHTSA component: ELECTRICAL SYSTEM; POWER TRAIN

## NHTSA's summary

Flash: Drivetrain Control Module \(DTCM\) Diagnostic and System Improvements This bulletin involves reprogramming the DTCM with the latest available software. The technician may find one or more of the following DTCs: C1415\-92 \- Transfer Case Motor Current\-Performance or Incorrect Operation. U1440 \- Implausible Transfer Case Ratio High Received. U0403\-00 \- Implausible Data Received From T\-case. C1403\-92 \- Transfer Case Range Position Sensor\-Performance Or Incorrect Operation\(2019\-2020 Vehicles Only\). If only DTC C1403 is present, follow normal diagnostic procedures before updating the DTCM. In addition the customer may describe one or more of the following:Traction Control System light is illuminated. A driveline bump can be heard/felt occasionally when the driver is steady on the throttle at about 20\-30% on a flat road while in 4WD AUTO\(2019\-2020 Vehicles Only\). An excessive electric motor clicking sound from the middle of the vehicle/transfer case area, when on and off the throttle\(2019\-2020 Vehicles Only\). An excessive electric motor clicking sound with steering wheel movement, most notable in parking lot or low speed maneuvering\(2019\-2020 Vehicles Only\). A ?Service 4WD? message/fault without commanding a transfer case shift\(2019\-2020 Vehicles Only\).If only the ?Service 4WD? message/fault is displayed in the Instrument Panel Cluster \(IPC\) and no other symptom/conditions are present, follow normal diagnostic procedures before updating the DTCM\(2019\-2020 Vehicles Only\). The blinking of the ?4WD Low? and ?4WD High? indicator lights at the same time, on the transfer case selector switch.If both 4WD indicator lights on the transfer case selector switch are blinking and no other symptom/conditions are present, follow normal diagnostic procedures before updating the DTCM\(2019\-2020 Vehicles Only\). During highway/freeway speeds, a bump in the driveline may be felt. This could also be described as a harsh transmission shift\(2019\-2020 Vehicles Only\).

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10223813-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10223813-9999.pdf)

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

## Components

Electrical system, Transmission and driveline

## Trouble codes named

C1403, C1415, U0403, U1440

## Vehicles listed

- 2019 to 2022 RAM 1500

## Recalls for the same vehicles and component

- [25V298000](/recalls/nhtsa/25V298000.md), 2025-05-08: AIR BAGS; ELECTRICAL SYSTEM:WIRING
- [23V265000](/recalls/nhtsa/23V265000.md), 2023-04-13: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)
- [2020401](/recalls/tc/2020401.md), 2020-08-28: Powertrain
- [20V080000](/recalls/nhtsa/20V080000.md), 2020-02-13: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\)
- [19V556000](/recalls/nhtsa/19V556000.md), 2019-07-26: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
- [2019206](/recalls/tc/2019206.md), 2019-04-26: Powertrain
- [19V324000](/recalls/nhtsa/19V324000.md), 2019-04-25: POWER TRAIN:DRIVELINE:DRIVESHAFT
- [19V142000](/recalls/nhtsa/19V142000.md), 2019-02-28: ELECTRICAL SYSTEM:12V/24V/48V BATTERY
- [18V556000](/recalls/nhtsa/18V556000.md), 2018-08-23: POWER TRAIN:AXLE ASSEMBLY
- [18V332000](/recalls/nhtsa/18V332000.md), 2018-05-17: ELECTRICAL SYSTEM:SOFTWARE; VEHICLE SPEED CONTROL:CRUISE CONTROL; ELECTRICAL SYSTEM:WIRING

## Other bulletins for the same vehicles and component

- [S2621000004](/bulletins/11038329.md), 2026-10-07, Service bulletin: POWER TRAIN. The Customer May Complain About a Popping Noise, Grinding Noise, or an Intermittent No Reverse or Forward Transmission Engagement. The Tech May Find Damaged and/or Worn Transmission Output Shaft Splines \(850RE Transmission Only\)
- [114072](/bulletins/11036362.md), 2026-08-26, Service bulletin: ELECTRICAL SYSTEM. MOTOR \- WINDOW REGULATOR
- [114073](/bulletins/11036361.md), 2026-08-26, Service bulletin: ELECTRICAL SYSTEM. MOTOR \- WINDOW REGULATOR
- [08\-291\-26](/bulletins/11035315.md), 2026-07-29, Service bulletin: ELECTRICAL SYSTEM. R1H UBQ/UEQ Intermittent HVAC Page Lockup Customers may experience one or more of the following: SYMPTOM: ● Intermittently the HVAC page on the Display Screen Module will change temperature and blower speed and then freeze. ● When on the HVAC page, the Display Screen Module may not respond to touch. All other pages operate as intended.
- [08\-288\-26](/bulletins/11035312.md), 2026-07-29, Service bulletin: ELECTRICAL SYSTEM. Radio Does Not Display Selected Drive Mode Customers may experience the following: SYMPTOM: ● Drive Mode setting reverts back to "Auto" on Display Screen Module while the Instrument Panel Cluster \(IPC\) shows the Drive Mode that has been requested.
- [S2608000033](/bulletins/11035198.md), 2026-07-23, Service bulletin: STRUCTURE:BODY; ELECTRICAL SYSTEM. Cluster Message “To Operate Tailgate Shift to Park” Vehicle is In Park
- [21\-057\-26](/bulletins/11035059.md), 2026-07-18, Service bulletin: POWER TRAIN. Flash: Transmission Control Module \(TCM\) Updates Customers may comment on one or more of the following: SYMPTOM: ● Harsh or slipping feeling during upshifts \(1st \- 5th\). ● Harsh or slipping feeling during kickdown events under throttle. ● Transmission fluid odor \(burnt smell\). This bulletin involves reprogramming the TCM with the latest available software.
- [21\-056\-26](/bulletins/11035058.md), 2026-07-18, Service bulletin: POWER TRAIN. Flash: Transmission Control Module \(TCM\) Updates Customers may comment on one or more of the following: SYMPTOM: ● \*\*Harsh or slipping feeling during upshifts \(1st \- 5th\). ● Harsh or slipping feeling during kickdown events under throttle. ● Transmission fluid odor \(burnt smell\).\*\* ● 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. This bulletin involves reprogramming the TCM with the latest available software.
- [08\-270\-26](/bulletins/11035045.md), 2026-07-18, Service bulletin: ELECTRICAL SYSTEM. Uconnect® Screen Image Changes Size, Customers may experience the following: SYMPTOM: ● The Uconnect® screen image changes size, moves or is out of place unprompted.
- [113069](/bulletins/11034910.md), 2026-07-08, Service bulletin: STRUCTURE:BODY; ELECTRICAL SYSTEM. SWITCH – HEADLAMP

JSON: [/v1/bulletins/10223813](/v1/bulletins/10223813)

[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%200814422&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10223813&vehicle=Service%20bulletin%200814422)