Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is saying there's a problem with the fuel injector for cylinder 3. It's like a tiny hose that sprays fuel into the engine, and the computer thinks it's getting too much electricity.
The engine control module (ECM) has detected a high voltage condition in the low side circuit of the high-pressure fuel injector for cylinder 3.
The P3110 code indicates that the ECM has detected an unusually high voltage in the low side circuit of the high-pressure injector for cylinder 3. This could be due to a short circuit, faulty wiring, or a malfunctioning injector.
• Check Engine Light is on
• Poor engine performance
• Misfire in cylinder 3
• Faulty injector
• Short circuit in the wiring
• ECM malfunction
ECM: Engine Control Module, the computer that controls the engine.
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 3 injector.
• Test the injector for proper operation.
• Repair or replace damaged wiring.
• Replace the faulty injector.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$200 - $600
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regular maintenance checks
• Keep electrical connections clean
• Use quality fuel
Engine Performance
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional.
• Avoid driving the vehicle if it feels unsafe.
Check with your vehicle manufacturer for warranty coverage on the ECM and injectors.
This code is relatively uncommon and usually associated with specific vehicle models that use high-pressure fuel systems.
Moderate – Addressing the issue soon can prevent further engine damage.
Driving with a malfunctioning injector can lead to increased emissions and potential safety hazards.
• Engine running
• Warm engine
The injector for cylinder 3 is located on the engine block, typically under the intake manifold.
Q: Can I drive with a P3110 code?
A: It's not recommended to drive for long with this code, as it can lead to engine damage.
Q: How can I reset the Check Engine Light?
A: After fixing the issue, you can use an OBD-II scanner to clear the code.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
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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.