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 helps spray fuel into the engine. It's like a squirt gun that isn't squirting properly.
The engine control module (ECM) has detected a low voltage or open circuit in the low side of the high-pressure fuel injector for cylinder 2.
The P3105 code indicates an issue with the electrical circuit that controls the low side of the high-pressure injector for cylinder 2. This could be due to a wiring issue, a faulty injector, or a problem with the ECM.
• Check engine light is on
• Engine misfires
• Poor fuel economy
• Faulty fuel injector
• Open or shorted wiring harness
• Poor electrical connection in the injector circuit
ECM: Engine Control Module
Injector: A device that sprays fuel into the engine's cylinders
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for cylinder 2 injector.
• Test the injector for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the faulty fuel injector.
• Check and repair the ECM if necessary.
• OBD-II scanner
• Multimeter
• Fuel injector tester
$150 - $400
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly inspect and maintain fuel injectors.
• Ensure proper electrical connections.
• Use high-quality fuel.
Engine Performance
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
• Consult a professional mechanic if unsure about the repairs.
Check with the vehicle manufacturer for warranty coverage on fuel injectors.
This code is typically associated with injector circuit issues and has been reported in various models with direct fuel injection systems.
Moderate – Should be addressed soon to avoid engine performance issues.
Driving with a misfiring engine can lead to increased emissions and potential safety hazards.
• Engine running
• At operating temperature
The fuel injector for cylinder 2 is located on the engine, typically near the intake manifold.
Q: Can I drive with a P3105 code?
A: It's not recommended to drive with this code as it can lead to engine performance issues.
Q: How do I clear a P3105 code?
A: After repairs, use an OBD-II scanner to clear the code from the ECM.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
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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.