Network
generic / SAE
U0630
Lost Communication With Engine Coolant Temperature Sensor 4
The vehicle bus reports loss of communication with smart engine coolant temperature sensor 4. Thermal management loses one of its temperature inputs and may use a substitute value.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number6 / 30
Possible causes
- Bus wiring open or shorted high
- Module without power or ground medium
- Module failed medium
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
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 60–400 €
- Estimated time: 0.5–1.5 h
- Component: ect sensor 4
- Component: vehicle bus wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012