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 electrical circuit that controls the fuel injector for cylinder 5 in your car's engine. It's like a light switch that's stuck and can't turn on properly.
The P3117 code indicates that the electrical circuit responsible for controlling the low side of the high-pressure injector for cylinder 5 is not functioning correctly, likely due to a low voltage issue.
The P3117 code is triggered when the Engine Control Module (ECM) detects a low voltage condition in the low side circuit of the high-pressure injector for cylinder 5. This could be due to wiring issues, a faulty injector, or a malfunctioning ECM.
• Engine misfire
• Poor fuel economy
• Check Engine Light illuminated
• Faulty injector
• Damaged wiring or connectors
• Malfunctioning ECM
ECM: Engine Control Module, the computer that manages engine functions.
Injector: A device that sprays fuel into the engine's cylinders.
• Inspect the injector wiring and connectors for damage.
• Test the injector for proper operation.
• Check the ECM for any faults or errors.
• Repair or replace damaged wiring or connectors.
• Replace the faulty injector.
• Reprogram or replace the ECM if necessary.
• Multimeter
• OBD-II scanner
• Injector tester
$200 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and maintain fuel injectors.
• Ensure proper electrical connections.
• Use high-quality fuel.
Engine Performance
• Get the issue diagnosed by a professional mechanic.
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
Check with your vehicle manufacturer for warranty coverage on fuel injectors and related components.
This code is commonly associated with vehicles that have high mileage or have been exposed to harsh driving conditions.
Moderate – It's important to address this issue soon to prevent engine damage and ensure optimal performance.
Ignoring this code could lead to increased emissions and potential engine damage, which may not comply with local emissions regulations.
• Engine at operating temperature
• Vehicle in idle or low load conditions
The fuel injector for cylinder 5 is located on the engine, typically near the intake manifold.
Q: Can I drive my car with a P3117 code?
A: It's not recommended to drive with this code active, as it can lead to engine damage and poor performance.
Q: How do I reset the P3117 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is resolved, the code should not return.
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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.