OBD-II code · Network
U014D Lost Communication with Mirror Control Module B
ECU lost CAN communication with mirror control module B. A communication loss with this module breaks any function relying on its data — diagnostic tools may show 'no response' and dependent modules can fall into limp mode.
Is it safe to drive with U014D?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyModule unpowered
- Less likelyGateway module routing CAN messages incorrectly
- Less likelyCAN terminating resistor (120 Ω) drifted out of spec
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
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Mirror Module B, Can Bus
Related codes
- U014ALost Communication With Battery Energy Control Module C
- U014BLost Communication With Hybrid/EV Battery Inductive Charging Module
- U014CLost Communication With Battery Energy Control Module D
- U014ELost Communication With Multi-axis Acceleration Sensor Module B
- U0150Lost Communication with Side Object Detection Control Module Left
- U0151Lost Communication with Restraints Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.