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.
2003 Ford Focus L4-2.3L VIN ZFACTORY OEM SERVICE PROCEDURE
Engine Temperature Sensor: Service and Repair
REMOVAL
1. Disconnect the battery ground cable.
2. Pull back the Cylinder Head Temperature (CHT) sensor cover and disconnect the electrical connector.
3. Remove the CHT sensor.
INSTALLATION
1. To install, reverse the removal procedure.
1. Disconnect the battery ground cable.
2. Pull back the Cylinder Head Temperature (CHT) sensor cover and disconnect the electrical connector.
3. Remove the CHT sensor.
INSTALLATION
1. To install, reverse the removal procedure.
Factory Service Tools
Use the Manual With the Right Hardware
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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.