OBD2 Car ScannerWhat does U0437 mean?
U0437 stands for Invalid Data Received From Differential Control Module Rear. Two or more of the car's computer modules are not communicating properly over the vehicle network (CAN bus).
Network codes cover the communication between the car's computer modules. When the car's computer sees a reading outside its normal range, it stores this code and may turn on a warning light on the dashboard.
Common causes
- Low or weak battery
- Damaged network wiring or connector
- A module that has lost power or failed
- Aftermarket accessories interfering with the network
What to do
- Read all stored and pending codes with a scanner. Several codes together often point to one cause.
- Note the freeze frame data (speed, temperature, load) recorded when the code was set.
- Inspect the wiring and connectors of the part named in the code for damage, corrosion or looseness.
- Fix the most likely and cheapest cause first, then clear the code and drive to see if it comes back.
Read this code from your own car
Plug in a cheap ELM327 adapter and the app shows every fault code, what it means and how to fix it.
Frequently asked questions
What does U0437 mean?
U0437 means “Invalid Data Received From Differential Control Module Rear”. It belongs to the network communication group: Two or more of the car's computer modules are not communicating properly over the vehicle network (CAN bus).
Is it safe to drive with U0437?
You can usually drive carefully for a short time, but fix it soon to avoid further damage or higher fuel use.
How do I clear U0437?
Fix the cause, then clear the code with an OBD2 scanner or app. If the fault is still there, the code will come back.
Related codes
- U0433Invalid Data Received From Cruise Control Front Distance Range Sensor
- U0434Invalid Data Received From Active Roll Control Module
- U0435Invalid Data Received From Power Steering Control Module Rear
- U0436Invalid Data Received From Differential Control Module Front
- U0438Invalid Data Received From Trailer Brake Control Module
- U0439Invalid Data Received From All Terrain Control Module
- U0441Invalid Data Received From Emissions Critical Control Information
- U0442Invalid Data Received From ECM/PCM B
Code meanings can vary by manufacturer. This page is general guidance, not a repair manual. Always confirm the cause before replacing parts.