Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means that the part of the car that helps spray fuel into the engine for cylinder number 5 is not working because there's a break in the electrical connection.
The code P3116 indicates that the electrical circuit controlling the low side of the high-pressure injector for cylinder 5 is open, meaning there is a break or disconnection in the wiring or component.
The P3116 code is triggered when the Engine Control Module (ECM) detects an open circuit in the low side of the high-pressure fuel injector for cylinder 5. This can affect the fuel delivery to the cylinder, potentially causing misfires or performance issues.
• Engine misfire
• Reduced engine performance
• Check Engine Light illuminated
• Faulty injector wiring or connector
• Damaged injector
• ECM malfunction
Injector: A device that sprays fuel into the engine's cylinders.
ECM: Engine Control Module, the computer that controls engine functions.
• Inspect the injector wiring and connector for damage or disconnection.
• Test the injector resistance and operation.
• Check the ECM for proper functioning.
• Repair or replace damaged wiring or connectors.
• Replace the faulty injector.
• Reprogram or replace the ECM if necessary.
• Multimeter
• OBD-II scanner
• Basic hand tools
$200 - $600
Moderate
• Toyota Camry
• Ford F-150
• Chevrolet Silverado
• Regularly inspect and maintain fuel system components.
• Ensure connectors and wiring are secure and undamaged.
• Use quality fuel to prevent injector clogging.
Engine Performance
• Avoid driving the vehicle extensively until the issue is resolved.
• Regular maintenance can prevent such issues.
Check with your vehicle manufacturer as some powertrain warranties may cover injector-related issues.
Injector circuit issues have been common in vehicles with high mileage or poor maintenance history.
Moderate – It should be addressed soon to prevent further engine damage.
Ignoring this issue can lead to increased emissions and potential engine damage, which may not comply with legal standards.
• Engine running
• Vehicle at operating temperature
The high-pressure injector for cylinder 5 is located on the engine, typically near the intake manifold on the side of the cylinder head.
Q: Can I drive with a P3116 code?
A: It's not recommended to drive extensively with this code as it can lead to further engine issues.
Q: What happens if I ignore this code?
A: Ignoring it can cause poor engine performance, increased emissions, and potential damage to the engine.
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.
View on Amazon
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.
View on Amazon
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.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.
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.
View options on Amazon
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.