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 something is not working right with the part that helps spray fuel into the second cylinder of the engine. It's like when a water gun doesn't spray properly because something is wrong with the trigger.
The code indicates an issue with the electrical circuit that controls the fuel injector for cylinder 2, specifically that the voltage is higher than expected.
P3106 is triggered when the Engine Control Module (ECM) detects a high voltage condition in the low side circuit of the high-pressure fuel injector for cylinder 2. This could indicate a problem with the injector circuit, wiring, or the injector itself.
• Engine misfire
• Poor fuel economy
• Check Engine Light illuminated
• Faulty fuel injector
• Wiring issues such as shorts or opens in the injector circuit
• Faulty ECM
ECM: Engine Control Module
Fuel Injector: A component 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 fuel injector for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the faulty fuel injector.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Fuel injector tester
$150 - $500
Moderate
• Toyota Camry
• Honda Accord
• Ford Fusion
• Regular maintenance and inspection of fuel injectors.
• Ensure proper electrical connections.
• Use quality fuel to prevent injector clogging.
Engine Performance
• Have the vehicle inspected by a professional mechanic.
• Avoid driving long distances until the issue is resolved.
Check with the vehicle manufacturer for warranty coverage on fuel system components.
This code has been associated with injector circuit issues in vehicles with direct fuel injection systems.
Moderate – Address the issue soon to avoid potential engine damage.
Driving with a malfunctioning injector can lead to increased emissions and potential engine damage.
• Engine running
• Vehicle at operating temperature
The fuel injector for cylinder 2 is located on the engine, near the cylinder head.
Q: Can I drive my car with a P3106 code?
A: It's not recommended to drive for long distances as it may cause further engine issues.
Q: How can I prevent injector issues?
A: Regular maintenance and using quality fuel can help prevent injector problems.
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.