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 fuel injector for cylinder 8 in your car. It's like a light switch that's stuck in the wrong position.
The engine control module (ECM) has detected an issue with the electrical circuit of the high-pressure injector for cylinder 8. This could be due to a short circuit or a high resistance in the circuit.
P313D indicates that the ECM has detected an interturn short circuit or high resistance in the low side circuit of the high-pressure fuel injector for cylinder 8. This can affect the injector's ability to properly control fuel delivery, leading to performance issues.
• Engine misfire
• Poor fuel economy
• Check Engine Light illuminated
• Faulty fuel injector
• Wiring issues such as damaged or corroded wires
• Faulty ECM or PCM
ECM: Engine Control Module
PCM: Powertrain Control Module
• Perform a visual inspection of the injector and wiring for cylinder 8.
• Use a multimeter to check for continuity and resistance in the injector circuit.
• Test the injector itself by swapping it with another cylinder.
• Repair or replace damaged wiring or connectors.
• Replace the faulty injector.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• BMW 5 Series
• Audi A6
• Mercedes-Benz E-Class
• Regularly inspect and maintain fuel injector wiring.
• Use quality fuel to prevent injector clogging.
• Perform regular engine diagnostics.
Engine Performance
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
Check with your vehicle manufacturer for warranty coverage on fuel injectors and related components.
This code is relatively uncommon and often associated with specific vehicle models known for injector issues.
Moderate – Addressing this issue promptly can prevent further engine damage.
Operating a vehicle with a faulty injector can lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Vehicle in a safe and stable condition
The fuel injector for cylinder 8 is located on the engine, typically on the right side when facing the vehicle.
Q: Can I drive with a P313D code?
A: It's not recommended to drive for extended periods with this code, as it can lead to engine damage.
Q: How can I reset the Check Engine Light?
A: You can reset the light with an OBD-II scanner after fixing the issue, but it may come back if the problem isn't resolved.
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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.