C1415 on 2019-2022 Ram 1500: Transfer Case Motor Fault Causes & Fixes

What's Unique About the 2019-2022 Ram 1500

For this specific generation of Ram 1500 (DT), a known software issue is the most common trigger for the C1415 code. FCA (now Stellantis) released a Technical Service Bulletin (TSB 08-144-22) that instructs dealers to reprogram the Drivetrain Control Module (DTCM) to correct this fault. This is different from many other vehicles where a similar code would almost always point directly to a failed transfer case motor. The TSB specifically addresses DTC C1415-92 (Performance or Incorrect Operation) for vehicles built on or before April 26, 2022.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• "Service 4WD" message on the dashboard
• Traction Control System (TCS) light is illuminated
• Inability to shift into or out of 4WD modes
• Blinking '4WD High' or '4WD Low' indicator lights
• Clicking or grinding noises from the transfer case area, especially when on/off throttle or during low-speed maneuvers (more common on 2019-2020 models per TSB).
• A noticeable 'bump' or harsh engagement from the driveline, sometimes described as a harsh shift.
• "Service Electronic Stability Control" message may also ap 🎬 See this quick fix for common traction control error messages.pear.

Most Likely Causes

1. Drivetrain Control Module (DTCM) Software Issue 🔴 High Probability A specific software anomaly was identified by the manufacturer for vehicles built on or before April 26, 2022, prompting TSB 08-144-22. This TSB supersedes a previous version (08-067-21), indicating an ongoing software refinement process.
   How to confirm: A Ram dealer can check if TSB 08-144-22 is applicable to the vehicle's VIN and if the software update has been performed. The TSB applies to vehicles with sales codes DH8, DH9, or DHZ (various electronic shift transfer cases).
   Typical fix: Reprogram the DTCM with the latest software using the dealer's wiTECH diagnostic tool. The process involves connecting a battery charger and flashing the module. Out of warranty, this typically costs one hour of shop labor ($100-$175).
   Est. part cost: $0
2. Failed Transfer Case Shift Motor 🟡 Medium Probability → Shop Transfer Case Motor The electric motor can wear out or fail electrically over time due to internal gear wear, corrosion, or moisture intrusion, which is a common issue on many 4WD vehicles.
   How to confirm: If the DTCM software is up to date and the code returns, a technician can use a bi-directional scan tool to command the motor to shift while monitoring its electrical current draw and position. If it fails to respond or the current is out of spec, the motor is faulty.
   Typical fix: Replace the transfer case shift motor. The Mopar OEM part number is often cited as 68450803AA for this generation.
   Est. part cost: $250-$870
3. Wiring Harness or Connector Damage ⚪ Low Probability The wiring leading to the transfer case is exposed under the vehicle and can be susceptible to corrosion or physical damage from road debris or environmental exposure.
   How to confirm: Visually inspect the wiring harness and connector for breaks, corrosion, or loose pins. Perform continuity and resistance checks on the motor control circuits between the DTCM and the shift motor. 🎬 Watch: How to diagnose erratic electrical and 5V reference issues.
   Typical fix: Repair the damaged section of the wiring harness or replace the connector.
   Est. part cost: $20-$150

Rare But Worth Checking

• Faulty Drivetrain Control Module (DTCM): While rare, the control module itself can fail internally. This should only be considered after all other possibilities, including the software update and motor/wiring checks, have been exhausted. On related platforms like the Jeep Grand Cherokee, this module (located under the driver's seat) is a known failure point.
• Internal Transfer Case Mechanical Failure: → Shop Transfer Case Motor A mechanical bind inside the transfer case could cause the shift motor to draw excessive current, triggering the code. This is unlikely and would typically be accompanied by severe grinding noises or a complete inability to drive.

Diagnosis Steps

1. Scan the Drivetrain Control Module (DTCM) for fault codes. Note if C1415 is present with U1440, U0403, or C1403.
2. Check with a Ram dealer if Technical Service Bulletin #08-144-22 applies to your vehicle's VIN. This is the most critical first step for trucks built on or before April 26, 2022.
3. If the TSB is applicable and has not been performed, have the dealer reprogram the DTCM. This is the most likely fix and should be done before any parts are replaced.
4. If the code returns after the software update, or if the TSB does not apply, proceed with physical diagnosis.
5. Inspect the wiring harness and connector at the transfer case shift motor for any signs of corrosion, damage, or loose connections.
6. Using a suitable scan tool (like wiTECH), monitor the transfer case motor current while commanding a shift. Compare the readings to manufacturer specifications.
7. If the motor fails to actuate or the current draw is incorrect, test the motor's power and ground circuits. A diagnostic procedure for a similar vehicle suggests checking the resistance of the motor control circuits; a reading above 5.0 Ohms indicates high resistance or an open circuit.
8. If the circuits are good but the motor does not function correctly, the transfer case shift motor is faulty and should be replaced. Confirm the correct part number for your vehicle (e.g., Mopar 68450803AA).

Parts You'll Likely Need

• Transfer Case Shift Motor (OEM #68450803AA) — If a software update doesn't resolve the issue, the motor itself is the next most likely component to have failed.
  Trusted brands: Mopar, Dorman, Cardone, APA/URO Parts
  OEM price range: $400-$650
  Aftermarket price range: $150-$450

Related Codes That Often Appear With This One

• U1440 — This code for 'Implausible Transfer Case Ratio High Received' is listed in the same TSB as C1415 and is often triggered by the same DTCM software issue.
• U0403-00 — Meaning 'Implausible Data Received From T-case', this code also points to a communication or logic failure related to the transfer case, and is also covered by TSB 08-144-22. It is frequently reported alongside C1415 in forum discussions.
• C1403-92 — For 'Transfer Case Range Position Sensor-Performance Or Incorrect Operation', this code is also mentioned in TSB 08-144-22 for 2019-2020 models as being resolved by the same software update.

Technical Service Bulletins (TSBs) & Recalls

• Bulletin #08-144-22: Involves reprogramming the Drivetrain Control Module (DTCM) with updated software to resolve C1415, U1440, U0403, and C1403. Applies to vehicles built on or before April 26, 2022. This bulletin supersedes TSB 08-067-21.

Platform-Specific Known Issues

• A software issue in the Drivetrain Control Module (DTCM) is a well-documented cause for this code on 2019-2022 models, addressed by TSB 08-144-22.
• First-year (2019) models of the DT generation were noted to have several initial bugs and electronic issues, with this 4WD system fault being one of them.

Mechanic-Grade Diagnostic Values

• Transfer Case Motor Current (Motor Not Commanded) — expected: Less than 1 Amp. Failure: A current reading greater than 1A for 200 milliseconds with no motor activation will set the code.
• Transfer Case Motor Current (During Shift) — expected: Greater than 1 Amp. Failure: A current reading that never exceeds 1A during a completed range or neutral shift will set the code.
• Resistance of Motor Control Circuits (T315 & T316) — expected: Below 5.0 Ohms. Failure: Resistance above 5.0 Ohms indicates an open or high-resistance circuit requiring repair.

Hidden / Shadow Codes Worth Checking

• C1415-92: The '-92' suffix specifies the failure type as 'Performance or Incorrect Operation'. It indicates the control module has detected that the component's performance is outside its expected range or it is operating incorrectly. (see via A professional scan tool like the dealer's wiTECH is required to see the two-digit failure type suffix. Basic OBD-II readers may only show 'C1415'.)

Scan Tool Commands That Help

• wiTECH: Reprogram DTCM — This is the primary repair step outlined in TSB 08-144-22 to load the latest software that corrects the logic for monitoring the transfer case motor.
• wiTECH: Clear All DTCs — This function is required after the reprogramming is complete to clear the C1415 code and any other related codes that were set in other modules during the flash process.
• wiTECH: Actuator Commands / System Tests — If the software flash does not fix the issue, a technician can use bidirectional controls to command the transfer case motor to shift while observing live data (like current draw) to determine if the motor is physically responding correctly.

Wiring & Ground Locations

• Drivetrain Control Module (DTCM) — Located in the passenger side footwell, behind the carpet and against the dash panel area.. This is the module that sets code C1415. All diagnostic wiring tests for the transfer case motor will originate or terminate at this module's connectors.
• Transfer Case Shift Motor Connector — On the transfer case assembly, connected to the shift motor.. This connector and its wiring are exposed under the vehicle and are a potential point of failure due to corrosion or damage. It contains the power and control circuits for the motor, such as 'Shift Motor Control A' and 'Shift Motor Control B'.
• Chassis Grounds — Various points on the frame and body. One common location on Ram trucks is on the frame in the driver's side wheelwell, forward of the upper control arm. Another is a ground strap from the firewall to the back of the engine block.. A poor ground connection for the DTCM or related components can cause erratic behavior and voltage-related fault codes. While not a primary cause for C1415, checking major grounds is a standard step in diagnosing any electrical issue.

Real Owner Repair Stories

• Reddit user post in r/ram_trucks (2025 Ram 1500 (demonstrates a common pattern applicable to 2019-2022 models)) — Multiple electronic issues including rough transmission shifts and other computer-related bugs.
  ❌ Tried (didn't work) Owner notes that dealers may try to diagnose and fail to replicate the problem, leading to multiple visits.
  ✅ What actually fixed it The owner took the truck to the dealer with a specific list of applicable TSBs and instructed them to flash the updates without performing diagnostics. The dealer completed the software flashes within a day, and all computer-related issues were solved.

OEM Part Supersession History

• 68450803AA → Current — This appears to be the stable and current part number for the transfer case shift motor for this vehicle range.
  Heads up: Multiple parts vendors confirm this part number fits 2019-2024 Ram 1500, 2500, and 3500 models, but always verify with VIN before purchasing.

Model Year Variations Within This Range

• 2019-2022 (Build date on or before April 26, 2022): These vehicles are subject to TSB 08-144-22, which involves a DTCM software update to fix the logic that triggers code C1415-92. Vehicles built after this date should have the updated software from the factory.
• 2019-2020 Only: The same TSB (08-144-22) that fixes C1415 also resolves DTC C1403-92 (Transfer Case Range Position Sensor-Performance Or Incorrect Operation), but this fix is noted as applying specifically to 2019-2020 models.