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) CHARTSP0121: ETC THROTTLE POSITION (TP1) SENSOR CIRCUIT RANGE/PERFORMANCE (VEHICLES WITH ELECTRONIC THROTTLE CONTROL (ETC))
2004 Ford Focus ZX3, 2.0 3, Standard
P0121: Etc Throttle Position (TP1) Sensor Circuit Range/Performance (Vehicles With Electronic Throttle Control (Etc))
2004 Ford Focus ZX3, 2.0 3, StandardSECTION P0121: Etc Throttle Position (TP1) Sensor Circuit Range/Performance (Vehicles With Electronic Throttle Control (Etc))
P0121 - ETC THROTTLE POSITION (TP1) SENSOR CIRCUIT RANGE/PERFORMANCE (VEHICLES WITH ELECTRONIC THROTTLE CONTROL (ETC))
| Description: | The ETC TP1 sensor was flagged as fault status by the PCM indicating an out of range in either the closed or wide open throttle modes. | ||
| Possible Causes: |
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| Diagnostic Aids: | The fault exhibits a symptom of limited power. A TP1 PID (TP V PID) reading less than 3.42% (0.17 volt) in key ON engine OFF, continuous memory or key ON engine running indicates a hard fault. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| Vehicles with electronic throttle control (ETC) | GO to PINPOINT TEST DV: THROTTLE BODY ASSEMBLY ETC Step 1. | GO to PINPOINT TEST DV: THROTTLE BODY ASSEMBLY ETC Step 1. | GO to PINPOINT TEST DV: THROTTLE BODY ASSEMBLY ETC Step 1. |
RENDER: 1.0x
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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.