Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer noticed that the part that helps make a spark in cylinder number 6 is either too hot or not working at all.
This code indicates that the ignition coil for cylinder 6 has been turned off because it got too hot, or it's not sending any signal.
The P3314 code is triggered when the Engine Control Module (ECM) detects an overtemperature condition or a lack of signal from the ignition coil in cylinder 6. This can lead to misfires or a complete lack of ignition in that cylinder.
• Engine misfire
• Rough idle
• Check Engine Light illuminated
• Faulty ignition coil
• Wiring issues or poor connections
• Overheating due to engine conditions
Ignition Coil: A component that transforms the battery's voltage to a higher voltage to create a spark in the spark plugs.
ECM: Engine Control Module, the computer that controls engine functions.
• Scan for codes and freeze frame data
• Inspect ignition coil and wiring for damage
• Test ignition coil for proper operation
• Replace faulty ignition coil
• Repair or replace damaged wiring
• Ensure proper cooling system function to prevent overheating
• OBD-II scanner
• Multimeter
• Socket set
$150 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular maintenance of ignition system
• Ensure cooling system is functioning properly
• Check for and repair any engine overheating issues promptly
Engine Performance
• Have your vehicle inspected by a professional if you experience rough idling or misfires.
• Regularly check and maintain your vehicle's cooling system.
Check with your vehicle manufacturer for specific warranty coverage on ignition components.
Ignition coil issues have been a common concern in vehicles, especially as engines have become more complex and reliant on electronic systems.
Moderate – Should be addressed soon to prevent further engine damage.
Driving with a misfiring engine can lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Ignition system under load
The ignition coil for cylinder 6 is typically located on the engine, near the spark plug for that cylinder.
Q: Can I drive with a P3314 code?
A: It's not recommended to drive for long periods with this code, as it can cause further engine damage.
Q: How do I know if my ignition coil is bad?
A: Common signs include engine misfires, rough idling, and a Check Engine Light.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
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Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Commonly relevant for misfire, ignition-efficiency, and some drivability-related repairs.
Misfire and ignition-related faults commonly involve spark plugs as part of the repair path.
Check the correct plug type, gap, and engine application for your vehicle.
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Fitment Required · Vehicle-fitment part
Relevant when the fault points toward ignition-coil performance or cylinder-specific ignition issues.
Some ignition faults involve coil performance or cylinder-specific coil problems.
Match the coil to your engine and confirm the failed component before ordering.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.