Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's engine has a problem with one of its cylinders, specifically cylinder number 12, which is not working properly. To prevent damage, the car stops sending fuel to that cylinder.
The engine control unit (ECU) has detected a misfire in cylinder 12 and has cut off fuel supply to prevent potential damage.
A misfire occurs when the air-fuel mixture in a cylinder fails to ignite properly. The ECU monitors the performance of each cylinder and, if it detects a misfire in cylinder 12, it may cut off fuel to that cylinder to protect the engine from damage. This can be caused by issues such as faulty spark plugs, ignition coils, or fuel injectors.
• Rough engine idle
• Decreased engine performance
• Illuminated check engine light
• Faulty spark plug in cylinder 12
• Defective ignition coil for cylinder 12
• Clogged or malfunctioning fuel injector in cylinder 12
Misfire: A failure of the air-fuel mixture in a cylinder to ignite properly.
ECU: Engine Control Unit, the computer that controls engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the spark plug and ignition coil for cylinder 12.
• Check the fuel injector for cylinder 12 for clogs or faults.
• Replace the spark plug for cylinder 12.
• Replace the ignition coil for cylinder 12.
• Clean or replace the fuel injector for cylinder 12.
• OBD-II scanner
• Spark plug socket
• Multimeter
$150 - $400
Moderate
• High-performance vehicles with more than 8 cylinders
• Luxury cars
• Sports cars
• Regular maintenance and tune-ups
• Use high-quality fuel
• Replace spark plugs and ignition components as recommended
Engine Performance
• Avoid driving at high speeds until the issue is resolved.
• Schedule a diagnostic check with a professional mechanic.
Check with the vehicle manufacturer for warranty coverage on engine components.
Misfire codes have been common in OBD-II systems since their introduction, often linked to ignition system faults.
High – Misfires can lead to engine damage if not addressed promptly.
Driving with a misfire can lead to increased emissions and potential engine damage.
• Engine running at idle
• Engine under load
Cylinder 12 is located on the engine block, typically towards the rear in a V12 engine configuration.
Q: Can I drive with a P1365 code?
A: It's not recommended to drive with a misfire code as it can cause further engine damage.
Q: What happens if I ignore a cylinder misfire?
A: Ignoring a misfire can lead to serious engine damage and increased repair costs.
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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.