Troubleshooting steps
Check sensor wiring, verify coolant level, replace sensor if faulty
Motorcycle Diagnostic Codes
F4 – Engine Coolant Temperature Sensor Error
ECT sensor error
Details
A fault has been detected with the engine coolant temperature sensor.
Error typeerror
MeaningECT sensor error
Typical causesFaulty sensor, wiring issue, sensor disconnected
SolutionsCheck sensor wiring, verify coolant level, replace sensor if faulty
Severitymedium
Catalog references
Where this appears
YamahaF4
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FAQ
Common questions
Will this cause overheating?
May cause incorrect temperature readings. Monitor actual engine temperature.
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