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 part of the car that squirts fuel into the engine. It's like a water gun that isn't working right, so the engine might not run smoothly.
The code indicates that there is an open circuit in the high pressure injector for cylinder 1, meaning the electrical connection is not complete.
P310C is triggered when the Engine Control Module (ECM) detects an open circuit in the high or low side of the high pressure injector for cylinder 1. This can affect the injector's ability to deliver fuel properly, impacting engine performance.
• Engine misfire
• Rough idling
• Reduced engine performance
• Faulty injector
• Damaged wiring or connectors
• Faulty ECM
ECM: Engine Control Module, the computer that controls the engine's functions.
Injector: A device that sprays fuel into the engine's cylinders.
• Inspect the wiring and connectors for damage.
• Test the injector for proper operation.
• Check the ECM for any faults.
• Repair or replace damaged wiring or connectors.
• Replace the faulty injector.
• Reprogram or replace the ECM if necessary.
• Multimeter
• OBD-II scanner
• Injector tester
$150 - $600
Moderate
• Volkswagen Golf
• Audi A4
• BMW 3 Series
• Regularly inspect and maintain fuel system components.
• Use high-quality fuel.
• Perform periodic engine diagnostics.
Engine Performance
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
• Consult a professional mechanic for accurate diagnosis and repair.
Repairs may be covered under the vehicle's powertrain warranty. Check with the manufacturer or dealership.
P310C is not a common code but can occur in vehicles with direct fuel injection systems as they age.
High – This issue can lead to significant engine performance problems and should be addressed promptly.
Ignoring this code can lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Vehicle in idle or low-load condition
The high pressure fuel injector is located on the engine, usually near the intake manifold for cylinder 1.
Q: Can I drive with a P310C code?
A: It's not recommended to drive with this code as it can lead to further engine damage.
Q: How is a fuel injector tested?
A: A fuel injector can be tested using a multimeter to check resistance and an injector tester to verify operation.
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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.