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, 2.3 Z, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS - CNG, FLEX-FUEL & GASOLINEDIAGNOSTIC TROUBLE CODE (DTC) CHARTSP0351: IGNITION COIL A PRIMARY/SECONDARY CIRCUIT MALFUNCTION
2004 Ford Focus ZX3, 2.3 Z, Standard
P0351: Ignition Coil A Primary/Secondary Circuit Malfunction
2004 Ford Focus ZX3, 2.3 Z, StandardSECTION P0351: Ignition Coil A Primary/Secondary Circuit Malfunction
P0351 - IGNITION COIL A PRIMARY/SECONDARY CIRCUIT MALFUNCTION
| Description: | See the description for DTC P0350. | ||
| Possible Causes: | See the possible causes for DTC P0350. | ||
| Diagnostic Aids: | - | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| Coil on plug ignition testing | - | GO to PINPOINT TEST JF: INTEGRATED IGNITION COIL ON PLUG COIL A THROUGH J FAILURE Step 1. | GO to PINPOINT TEST JF: INTEGRATED IGNITION COIL ON PLUG COIL A THROUGH J FAILURE Step 1. |
| Coil pack ignition testing: | - | GO to PINPOINT TEST JE: INTEGRATED IGNITION COIL PACK A, B OR C FAILURE Step 1. | GO to PINPOINT TEST JE: INTEGRATED IGNITION COIL PACK A, B OR C FAILURE Step 1. |
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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.