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P0126 Mazda

P0126 Mazda - Coolant Thermostat Condition Low Operating Temperature

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P0126 Mazda Comments |  Add Comment
Possible causes
- Low engine coolant level
- Leaking or stuck open thermostat
- Faulty Engine Coolant Temperature (ECT) sensor
- Engine Coolant Temperature (ECT) sensor harness is open or shorted
- Engine Coolant Temperature (ECT) sensor electrical circuit poor connection
Help with Possible causes What does this mean?
When is the code detected?
The voltage sent to Engine Control Module (ECM) from the sensor is not practical, even when some time has passed after starting the engine.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0126 Mazda Description

The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the Engine Control Module (ECM). The modified signal returns to the ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.

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MAZDA Technical Service Bulletins for P0126 code
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