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.
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HOMESERVICE MANUALSFORD2004FOCUS ZX3, 2.0 3, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS - CNG, FLEX-FUEL & GASOLINEDIAGNOSTIC TROUBLE CODE (DTC) CHARTSP0119: ENGINE COOLANT TEMPERATURE (ECT) SENSOR 1 CIRCUIT INTERMITTENT/ERRATIC
2004 Ford Focus ZX3, 2.0 3, Standard
P0119: Engine Coolant Temperature (ECT) Sensor 1 Circuit Intermittent/Erratic
2004 Ford Focus ZX3, 2.0 3, StandardSECTION P0119: Engine Coolant Temperature (ECT) Sensor 1 Circuit Intermittent/Erratic
P0119 - ENGINE COOLANT TEMPERATURE (ECT) SENSOR 1 CIRCUIT INTERMITTENT/ERRATIC
| Description: | Indicates the ECT circuit became intermittently open or shorted while the engine was running. Note that on some vehicles which are not equipped with an ECT sensor, the CHT can be used and can set this DTC. | ||
| Possible Causes: |
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| Diagnostic Aids: | Monitor the ECT or CHT on a diagnostic tool, and look for sudden changes in the reading when the harness is wiggled or the sensor is tapped. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| Vehicles with a CHT sensor only | - | - | GO to PINPOINT TEST DL: CYLINDER HEAD TEMPERATURE (CHT) SENSOR Step 15. |
| Vehicles with an ECT sensor only | - | - | GO to PINPOINT TEST DX: ENGINE COOLANT TEMPERATURE (ECT) SENSOR Step 15. |
| Vehicles with both CHT and ECT sensor | - | - | GO to PINPOINT TEST DX: ENGINE COOLANT TEMPERATURE (ECT) SENSOR Step 15. |
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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.