U0400

Invalid Data Received

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

~$167 (est.)

Symptoms

Check Engine light comes on
Unstable engine operation
Power Loss
Incorrect operation of other vehicle systems
Errors in other modules

Causes

Malfunction of the data sending module
Damage to CAN bus wiring
Poor contact in connectors
Problems with module power supply
Software errors in modules

How to Fix

Check error codes in other modules
Inspect the CAN bus wiring and connectors
Check power and ground of modules
Test the data sending module
Update module software

Related codes

U0401 U0402 U0121