Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Engine Coolant Temperature (ECT) Sensor
The B2300 pickup and Tribute 2.0L use a Cylinder Head Temperature (CHT) sensor. See CYLINDER HEAD TEMPERATURE SENSOR .
The ECT sensor is a thermistor device which changes resistance proportionate to temperature changes. The ECT sensor inputs engine coolant temperature to the PCM. For ECT sensor location, see CHT & ECT SENSOR LOCATIONS table.
| Application | Location | |||
|---|---|---|---|---|
| B2300 (1) | Top Center Of Cylinder Head | |||
| B3000 & B4000 | Top Front Of Intake Manifold | |||
| Mazda6 | ||||
| 2.3L | Rear Of Engine Under Ignition Coil | |||
| 3.0L | Top Rear Of Engine | |||
| Miata | Top Rear Of Engine | |||
| MPV | Top Rear Of Engine | |||
| Protege & Protege5 | Top Rear Of Engine | |||
| Tribute | ||||
| 2.0L (1) | Front Of Engine By Alternator | |||
| 3.0L | Top Rear Of Engine | |||
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.