What does it mean?
U1214 is a Network (CAN bus, module communications) fault code. It indicates: Lost Communication With Right Door Track Impact Acceleration Sensor .
Symptoms
- Airbag warning lamp stays on from the moment the ignition is switched on
- Right side airbag and curtain will not deploy in an impact
- Restraint system warning message displayed
- Fault sets again as soon as the codes are cleared
- Belt pretensioner function may also be disabled
- Airbag lamp causes an inspection failure
Likely causes
- Sensor connector at the right sill or B-pillar not fully latched, corroded or full of moisture
- Damaged wiring under the right sill trim, typically after seat, carpet or trim removal
- Right side impact sensor failed internally
- Water reaching the sensor from a blocked sunroof or door drain, or a leaking door membrane
- Open or shorted sensor circuit back to the restraint control module
- Unrepaired damage from a previous impact on that side of the vehicle
- Restraint control module internal fault or poor power and ground supply
How to fix it
- Read the restraint module and check whether the code is current, and look for a stored deployment record
- Lift the right sill trim and examine the sensor, its mounting and its connector
- Reseat the connector and check the terminals for corrosion, spreading and push-back
- Measure the sensor circuit for continuity and for a short to ground back at the module connector
- Dry out and repair any water leak into the footwell before repairing the wiring
- Retorque the sensor to the body specification
- Fit a new impact sensor if the circuit is proven good; consider the restraint module only afterwards