What it means
A receiving module detected implausible data from mirror control module A. Mirror position, fold/unfold state or heating values fail plausibility checks and are rejected.
How it works
Mirror control module A reports mirror position, fold state, or heating information over the vehicle network. A receiving module sets U0514 when that data fails its plausibility checks and is rejected.
Common causes
Most likely first.
- Module internal fault or sensor input drift
- Software version mismatch after replacement
- Gateway module routing CAN messages incorrectly
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
How to diagnose it
- Scan all modules and record freeze-frame data and related communication codes to identify which module rejected mirror control module A's data.
- Use live data while adjusting, folding, and heating the affected mirror, if equipped, and note which reported value becomes implausible.
- Inspect the mirror module connectors and wiring for looseness, corrosion, damage, or water intrusion.
- Check for recent mirror-module replacement or software updates and verify that the installed module is compatible with the vehicle.
- Have a qualified technician check network messages and gateway routing between mirror control module A and the reporting module.
Common fixes
- Repair a loose, corroded, or damaged mirror-module connector or wire.
- Correct module configuration or software compatibility after a replacement.
- Repair or replace mirror control module A if its data remains implausible.
- Repair gateway routing or network faults identified in testing.
Can I keep driving?
If mirror controls are the only affected function, driving is generally unaffected, but check that the mirror is positioned securely and gives adequate visibility. If other warnings or functions fail, avoid driving until those safety-related systems are checked.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.