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 3 in your car's engine. It's like a light switch not working right, so the fuel injector can't do its job properly.
The code P317E indicates an issue with the low side circuit of the hydrogen injector for cylinder 3, suggesting a problem with the electrical signal or connection.
The P317E code is triggered when the Engine Control Module (ECM) detects a low voltage condition in the low side circuit of the hydrogen injector for cylinder 3. This could be due to a short circuit, open circuit, or a fault in the injector itself.
• Check Engine Light is on
• Engine misfires
• Poor engine performance
• Faulty injector for cylinder 3
• Wiring issues in the injector circuit
• Malfunctioning ECM
ECM: Engine Control Module, the computer that controls engine functions
Injector: A device that sprays fuel into the engine's cylinders
• Use a scan tool to verify the code
• Inspect the wiring and connectors for cylinder 3 injector
• Test the injector for proper operation
• Repair or replace faulty wiring or connectors
• Replace the injector if defective
• Reprogram or replace the ECM if necessary
• OBD-II scan tool
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Toyota Mirai
• Honda Clarity Fuel Cell
• Hyundai Nexo
• Regularly maintain vehicle electrical systems
• Inspect and clean injector connectors
• Ensure ECM software is up-to-date
Engine Performance
• Avoid driving the vehicle until the issue is fixed
• Consult with a professional mechanic
• Regularly check for updates or recalls
Check with the manufacturer for specific warranty coverage related to fuel injectors and ECM issues.
This code is relatively new and specific to vehicles using hydrogen fuel cell technology, reflecting advancements in automotive technology.
High – This issue can lead to engine misfires and poor performance, which should be addressed promptly to avoid further damage.
Driving with a malfunctioning injector can lead to increased emissions and may not comply with local emissions laws.
• Engine running
• Vehicle in a safe, stationary position
The hydrogen injector for cylinder 3 is located on the engine block, typically on the side or top, depending on the vehicle model.
Q: Can I drive with code P317E?
A: It's not recommended to drive with this code active, as it can lead to engine misfires and damage.
Q: How can I prevent this code from appearing?
A: Regular maintenance and inspections of the fuel system and electrical connections can help prevent this issue.
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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.