U0253critical severityNetwork
Lost Communication with Collision Avoidance Module
on 2015 Kia Forte 1.8L I4 · FWD
What this code means
Cannot communicate with the pre-collision or collision mitigation control module.
Symptoms
- Pre-collision warning disabled
- Automatic emergency braking off
- Collision avoidance system fault
- Safety system warning light
Common causes
- Collision avoidance module failure
- CAN bus wiring
- Module power loss
- Fuse blown
- Sensor obstruction
- Calibration needed
Diagnostic steps
- Check module fuse
- Test power and ground
- Check CAN wiring
- Clean all sensors
- Check for sensor calibration need
- Inspect front fascia for damage
Repair notes
Safety critical ADAS system. Check fuses and sensor condition. Requires professional calibration after service.
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ANCEL AD410 →
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Serious DIY~$100
BlueDriver Pro →
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Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
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Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
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Other Network codes on this vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus