P0671 Ford Code - Cylinder 1 Glow Plug Circuit Fault
Quick Answer
The P0671 diagnostic trouble code (DTC) for Ford vehicles indicates a problem with the glow plug circuit in cylinder 1 of the engine. Common causes include Malfunctioning glow plug in cylinder 1, Damaged wiring connecting the glow plug to the ECM, Faulty glow plug relay. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0671 Ford indicates Cylinder 1 Glow Plug Circuit Fault.
- Common causes
- Common causes include Malfunctioning glow plug in cylinder 1, Damaged wiring connecting the glow plug to the ECM, Faulty glow plug relay.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P0671 Ford Description
The P0671 diagnostic trouble code (DTC) for Ford vehicles indicates a problem with the glow plug circuit in cylinder 1 of the engine. Glow plugs are essential components in diesel engines that help with cold starting by heating the combustion chamber before ignition. When the engine is cold, the glow plug warms up to aid in the ignition process, ensuring a smooth start-up. The glow plug circuit fault can disrupt this process, leading to difficulties starting the vehicle, rough idling, decreased fuel efficiency, and potential engine misfires. If left unaddressed, this issue can cause long-term damage to the engine and exhaust system, as well as increased emissions.
Common Causes of P0671 Ford
- Malfunctioning glow plug in cylinder 1.
- Damaged wiring connecting the glow plug to the ECM.
- Faulty glow plug relay.
- Issues with the engine control module (ECM).
- Corrosion or poor connections in the glow plug circuit.
Symptoms of P0671 Ford
- Hard starting or difficulty starting the vehicle, especially in cold weather.
- Rough idling or engine misfires.
- Decreased fuel efficiency.
- Illumination of the check engine light on the dashboard.
- Increased emissions from the exhaust.
How to Fix P0671 Ford
- Begin by diagnosing the specific cause of the glow plug circuit fault, using a diagnostic tool to pinpoint the exact issue.
- Check the resistance of the glow plug in cylinder 1 to determine if it is functioning correctly. Replace the glow plug if necessary.
- Inspect the wiring harness connecting the glow plug to the ECM for any damage or corrosion. Repair or replace any faulty wiring.
- Test the glow plug relay to ensure it is sending the correct signals to the glow plug. Replace the relay if it is faulty.
- If the issue persists, check the ECM for any malfunctions or errors. Replace or reprogram the ECM as needed to address the glow plug circuit fault.
Cost to Fix P0671 Ford
The typical repair costs for a cylinder 1 glow plug circuit fault can range from $150 to $500, depending on the specific cause of the issue and the cost of parts and labor. It's essential to keep in mind that diagnostic time and labor rates at auto repair shops can vary significantly based on location, vehicle make and model, and engine type. Therefore, it's advisable to check with local shops for a more accurate estimate tailored to your specific situation.
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Frequently Asked Questions about P0671 Ford Code
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Discuss the causes and fixes for P0671 Ford OBDII Code
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change and as we check the injector harness plugs the inyectore and if current land and pulsation
clean the grease and pour module and change electrical injection module and apparently consisted hot but cold failure is the failure and struggle to turn and no lightcomes on check Enger but it remains a code PO671 and the injection heats andremoves the fault What else could it be?
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