Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means there's a problem with the part of the car that helps spray fuel into the engine for cylinder number 12. It's like a light switch that isn't working, so the fuel can't get through.
The code indicates that the electrical circuit responsible for controlling the fuel injector for cylinder 12 is open, meaning there is a break in the circuit.
The P3144 code is triggered when the Engine Control Module (ECM) detects an open circuit in the low side of the high-pressure fuel injector circuit for cylinder 12. This can prevent the injector from operating correctly, leading to misfires or poor engine performance.
• Engine misfire
• Poor fuel economy
• Check Engine Light illuminated
• Faulty high-pressure fuel injector
• Damaged wiring or connectors
• Faulty ECM
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 12 injector.
• Test the injector for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the faulty injector.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• BMW 7 Series
• Mercedes-Benz S-Class
• Audi A8
• Regular maintenance checks
• Inspect wiring harnesses periodically
• Use high-quality fuel
Engine Performance
• Avoid driving the vehicle until repaired to prevent further damage.
• Consult a professional mechanic for accurate diagnosis.
Check if your vehicle is still under warranty for powertrain components.
This code is more common in vehicles with direct fuel injection systems that have higher mileage.
Moderate – Should be addressed soon to avoid engine performance issues.
Driving with this issue can lead to increased emissions and potential engine damage.
• Engine running
• Warm engine temperature
The fuel injector for cylinder 12 is located on the engine, typically under the intake manifold.
Q: Can I drive with a P3144 code?
A: It's not recommended as it can lead to further engine damage and poor performance.
Q: How can I prevent this code from appearing?
A: Regular maintenance and using high-quality fuel can help prevent injector-related issues.
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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.