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 has detected a problem with the fuel injector on cylinder 2. It's like a wire is touching something it shouldn't, causing a short circuit.
This code indicates that there is an electrical short between the high side of the fuel injector circuit for cylinder 2 and the coil. This can disrupt the proper operation of the injector.
The P3151 code is triggered when the Engine Control Module (ECM) detects a short circuit between the high pressure injector's high side and the ignition coil in cylinder 2. This can lead to improper fuel injection timing and quantity, affecting engine performance.
• Engine misfire
• Poor fuel economy
• Check engine light illuminated
• Damaged wiring harness
• Faulty fuel injector
• Short circuit in the ignition coil
ECM: Engine Control Module
Injector: A device that sprays fuel into the engine's intake manifold or cylinders
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring harness for damage or wear.
• Test the fuel injector and ignition coil for proper operation.
• Repair or replace damaged wiring.
• Replace the faulty fuel injector.
• Replace the ignition coil if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Toyota Camry
• Honda Accord
• Ford Focus
• Regularly inspect wiring for wear.
• Perform routine maintenance on fuel injectors.
• Avoid exposure of electrical components to moisture.
Engine Performance
• Do not ignore the check engine light.
• Seek professional diagnosis if unsure.
• Avoid driving the vehicle if performance is severely affected.
Check with the vehicle manufacturer for warranty coverage on engine components.
This code is relatively uncommon and typically associated with specific models known for wiring issues.
Moderate – Addressing this issue promptly can prevent further engine damage.
Driving with a misfiring engine can lead to increased emissions and potential safety hazards.
• Engine running
• All electrical systems active
The fuel injector for cylinder 2 is located on the engine block, typically near the intake manifold.
Q: Can I drive with a P3151 code?
A: It's not recommended to drive with this code, as it can lead to engine damage and poor performance.
Q: How can I prevent this code from appearing?
A: Regular maintenance and inspection of the vehicle's electrical components can help prevent this issue.
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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.