Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that there's a problem with the electrical circuit that controls the fuel injector for cylinder 8 in your car's engine. It's like a light switch that can't turn on because the wires are not connected properly.
The code indicates an open circuit in the high-pressure fuel injector's electrical path for cylinder 8, preventing proper injector operation.
P313F is triggered when the Engine Control Module (ECM) detects an open circuit condition in the high-pressure fuel injector circuit for cylinder 8. This can result from a break in the wiring, a faulty connector, or a malfunctioning injector. The injector's low side or high side circuit may be compromised, affecting the fuel delivery to the cylinder.
• Engine misfire
• Poor fuel economy
• Check Engine Light illuminated
• Faulty fuel injector
• Damaged wiring or connectors
• Faulty Engine Control Module (ECM)
ECM: Engine Control Module, the computer that controls engine functions.
Injector: A component that sprays fuel into the engine's cylinders.
• Perform a visual inspection of the wiring and connectors for damage.
• Use a multimeter to check for continuity in the injector circuit.
• Test the injector with a noid light to ensure it's receiving signals.
• Repair or replace damaged wiring or connectors.
• Replace the faulty fuel injector for cylinder 8.
• Reprogram or replace the ECM if necessary.
• Multimeter
• Noid light
• OBD-II scanner
$200 - $600
Moderate
• BMW 5 Series
• Audi A6
• Mercedes-Benz E-Class
• Regularly inspect and maintain the fuel system.
• Ensure connectors are clean and secure.
• Use quality fuel to prevent injector clogging.
Engine Performance
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if you experience engine misfires.
• Regular maintenance can prevent such issues.
Check with your vehicle manufacturer for warranty coverage on fuel system components.
This code has been associated with issues in direct fuel injection systems, particularly in European vehicles.
Moderate – Addressing this issue promptly can prevent engine damage and ensure optimal performance.
Driving with a misfiring engine can be unsafe and may lead to further mechanical damage. It is advisable to address this issue as soon as possible.
• Engine at operating temperature
• Vehicle in idle or low-load conditions
The fuel injector for cylinder 8 is located on the engine, typically near the intake manifold.
Q: Can I drive with a P313F code?
A: It's not recommended to drive with this code active as it can cause engine damage and poor performance.
Q: How can I prevent injector circuit issues?
A: Regular maintenance and inspections can help prevent wiring and connector issues that lead to this code.
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Universal · Digital multimeter
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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.