Lost Communication with Mirror Control Module
Diagnostic trouble code U0213 indicates that the main engine or powertrain control module (ECM/PCM) has lost communication with the mirror control module over the vehicle's data bus (CAN, LIN, or similar). This module manages power mirror adjustments, heating, integrated turn signals, auto-dimming, and memory functions. The fault is triggered when valid messages are not received for a manufacturer-defined period, disrupting mirror-related features.
1. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.
2. Most Common Causes
- Faulty mirror control module
- Open, shorted, or damaged CAN/LIN bus wiring to the mirror module
- Corroded, loose, or disconnected electrical connector at the mirror module
- Faulty bus termination resistor
- Blown fuse or poor ground supplying the mirror module
- Faulty gateway module preventing message routing
- Moisture or vibration damage to the mirror control module
3. Symptoms You Will Notice
- Power mirrors do not adjust electrically
- Mirror heating, turn signals, or auto-dimming functions inoperative
4. Step-by-Step Diagnosis
Check for blown fuses related to the mirror module and verify battery voltage and ground at the module connector.
Inspect the mirror module connector and wiring for corrosion, damage, or looseness; repair as needed.
Use a scan tool to check for communication on the CAN/LIN bus; verify that the mirror module is responding.
If no communication, test bus wiring continuity and resistance; check for proper termination.
If wiring and power are OK, suspect a faulty mirror control module and replace it.
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, it is safe to drive. The vehicle will operate normally, but mirror-related features will be unavailable.
How much does it cost to fix?▼
Repair costs typically range from $150 to $600, depending on whether the issue is a simple fuse, wiring repair, or module replacement.