Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the electrical part of the fuel injector for cylinder 10 in your car's engine. It's like a light bulb that isn't getting power, so it can't turn on.
The P314F code indicates an open circuit condition in the high pressure fuel injector for cylinder 10. This means the electrical path is broken, preventing the injector from functioning properly.
The code P314F is triggered when the engine control module (ECM) detects an open circuit in the low side or high side of the high pressure injector circuit for cylinder 10. This can prevent the injector from delivering the correct amount of fuel to the engine, affecting performance.
• Engine misfire
• Poor fuel economy
• Check Engine Light on
• Faulty injector
• Damaged wiring harness
• Bad connector
Injector: A device that sprays fuel into the engine's cylinders.
Circuit: A complete path that allows electricity to flow.
• Check for stored codes and freeze frame data.
• Inspect the wiring and connectors for damage.
• Test the injector circuit for continuity.
• Replace the faulty injector.
• Repair or replace damaged wiring.
• Ensure all connectors are secure.
• OBD-II scanner
• Multimeter
• Wiring repair kit
$200 - $500
Moderate
• BMW 7 Series
• Audi A8
• Mercedes-Benz S-Class
• Regular maintenance checks
• Ensure proper fuel quality
• Inspect wiring periodically
Engine Performance
• Avoid driving with this code active to prevent engine damage.
• Consult a professional mechanic for diagnosis and repair.
Check with your vehicle manufacturer for warranty coverage on fuel injectors.
This code has been associated with issues in high-performance engines requiring precise fuel delivery.
High – This issue can lead to poor engine performance and increased emissions.
Driving with a malfunctioning injector can lead to increased emissions and may not comply with local emissions regulations.
• Engine running
• Injector circuit under load
The high pressure injector for cylinder 10 is located on the engine, typically near the intake manifold.
Q: Can I drive my car with a P314F code?
A: It's not recommended as it can lead to engine damage and poor performance.
Q: What happens if I ignore this code?
A: Ignoring the code can result in severe engine damage and increased repair costs.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
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.