U0404 on 2011-2023 Ram 1500 — Invalid Data Received From Gear Shift Control Module A
1 vehicles · 1 makes · $300-$900 repair
Most Reported On
U0404 is an OBD-II diagnostic trouble code meaning “Invalid Data Received From Gear Shift Control Module A.” Sets when a module receives invalid data from Gear Shift Control Module 'A' (shift-by-wire) over the bus. Bus integrity, calibration, or module faults are typical. This code is most commonly reported on 2011-2023 Ram 1500, with repair costs ranging from $300 to $900.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose U0404, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does U0404 mean?
U0404 stands for "Invalid Data Received From Gear Shift Control Module A." Sets when a module receives invalid data from Gear Shift Control Module 'A' (shift-by-wire) over the bus. Bus integrity, calibration, or module faults are typical.
What are the most common causes of U0404?
The most common causes of U0404 are: CAN bus wiring fault or poor ground, Weak battery / low voltage, Calibration mismatch, Failing gear shift control module. The specific cause varies by vehicle.
How much does it cost to fix U0404?
Repair costs for U0404 range from $300 to $900, depending on the vehicle and root cause.
Which vehicles are affected by U0404?
Au7o has documented U0404 across 1 vehicle models from 1 manufacturers: Ram.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.