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Service bulletin 9004400

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10218446
Published by NHTSA2022-08-22
Manufacturer's number9004400
Manufacturer's date2021-08-25
NHTSA componentWHEELS

NHTSA's summary

AXLE ASSEMBLY, Rear Complete On dual rear wheel high output trucks displaying wheel speed DTCs C003A-2F RR WSS or C0037-2F LR WSS, but for which diagnostics are not finding any hardware problems, and for which the customer narrative includes comments about driving on highway rumble strips, please do not replace the axle, wheel speed sensors, harness, and/or ABS module. Engineering is working to determine a root cause, please clear the codes and encourage the driver to avoid rumble strips until a repair becomes available. If this issue does not describe your concern, please proceed with repair.

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

Wheels

Trouble codes named

C0037, C003A

Vehicles listed
RAM 35002019, 2020, 2021, 2022

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20213362021-05-28. Wheels
21V3980002021-05-27. WHEELS:LUGS/NUTS/BOLTS/STUDS

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
S25220000032025-10-15. Service bulletin. Tire Pressure Monitor (TPM) Warning Lamp On Or Flashing. Sensor(s) Not Reading And Or Showing Dashes.
1045252025-04-30. Service bulletin. SENSOR - WHEEL SPEED
S2422000001 REV.C2024-11-13. Service bulletin. Tire Pressure Monitor (TPM) Service Information. TPM Lamp On.
S24220000032024-10-10. Service bulletin. Trailer Tire Pressure Monitor (TTPM) Programming Tips And Operation Information.
S2208000153 REV.B2024-09-27. Service bulletin. Tire Pressure Lamp Flashing, No Tire Pressures Displayed, “Tire Pressure Module (TPM) System Unavailable” Message Displayed on Cluster
S22050000022024-03-18. Service bulletin. C003A-2F Right Rear Wheel Speed Sensor, C0037-2F Left Rear Wheel Speed Sensor Diagnostic Trouble Codes (DTCs) Set While Driving With Payload Or Trailer Towing.
08044232024-01-02. Service bulletin. Radio Over The Air S24.13 and S24.18 Updating to S26.17 Software Version Customers may experience one or more of the following: ? **Blank screen (Rear view camera is not affected and will still function normally).** ? Battery drain. ? Radio resets (Rear view camera will still function normally). ? Wireless connectivity device disconnect. ? CarPlayT icon does not appear in device manager. ? Climate icon missing. ? Audio disruptions. ? SXMT inoperative. ? Audio muted. ? Passenger screen blank. ? Passenger screen apps missing. ? Missing profiles icon. ? Instrument Panel Cluster (IPC) displays incorrect audio source. ? Radio is slow to respond. ? Trailer tire pressure configurations deleted. ? Steering wheel controls skipping SXMT channels. ? Recent calls not displayed. ? Phone audio playing with ignition off. The following improvements are also included with this update: ? Apple CarPlayT and Android AutoT improvements. ? Voice Recognition (VR) command improvements. ? Uconnect phone improvements. ? FOTA improvements. ? Passenger screen camera app improvements. ? Icon size/layout improvements. This bulletin provides information regarding the latest Firmware Over The Air (FOTA) update and provides the service technician an overview of the steps a customer will need to take to complete the update. The radio software will be updated from S24.13 or S24.18 to S26.17. NOTE: The national launch for the FOTA is expected to begin November 25, 2022.
S23030000022024-01-02. Service bulletin. Ratchet Type Click Noise Heard In Four Wheel Drive (4WD) While Turning.
S22050000022023-10-02. Service bulletin. C003A-2F Right Rear Wheel Speed Sensor, C0037-2F Left Rear Wheel Speed Sensor Diagnostic Trouble Codes (DTCs) Set While Driving With Payload Or Trailer Towing.
08044232023-04-17. Service bulletin. Radio Over The Air S24.13 and S24.18 Updating to S26.17 Software Version Customers may experience one or more of the following: ? **Blank screen (Rear view camera is not affected and will still function normally).** ? Battery drain. ? Radio resets (Rear view camera will still function normally). ? Wireless connectivity device disconnect. ? CarPlayT icon does not appear in device manager. ? Climate icon missing. ? Audio disruptions. ? SXMT inoperative. ? Audio muted. ? Passenger screen blank. ? Passenger screen apps missing. ? Missing profiles icon. ? Instrument Panel Cluster (IPC) displays incorrect audio source. ? Radio is slow to respond. ? Trailer tire pressure configurations deleted. ? Steering wheel controls skipping SXMT channels. ? Recent calls not displayed. ? Phone audio playing with ignition off. The following improvements are also included with this update: ? Apple CarPlayT and Android AutoT improvements. ? Voice Recognition (VR) command improvements. ? Uconnect phone improvements. ? FOTA improvements. ? Passenger screen camera app improvements. ? Icon size/layout improvements. This bulletin provides information regarding the latest Firmware Over The Air (FOTA) update and provides the service technician an overview of the steps a customer will need to take to complete the update. The radio software will be updated from S24.13 or S24.18 to S26.17. NOTE: The national launch for the FOTA is expected to begin November 25, 2022.