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 noticed that one of the engine's cylinders isn't working right, so it stopped sending fuel to it to prevent damage.
The engine control module (ECM) has detected a misfire in one or more cylinders and has disabled fuel delivery to prevent potential damage to the engine and catalytic converter.
When the ECM detects a misfire, it can disable the fuel injector for the affected cylinder to prevent unburned fuel from entering the exhaust system, which could damage the catalytic converter. This code indicates that such a misfire has been detected and fueling has been disabled as a protective measure.
• Check Engine Light is on
• Engine runs rough or shakes
• Reduced engine performance
• Faulty spark plugs or ignition coils
• Fuel injector issues
• Vacuum leaks
ECM: Engine Control Module
Catalytic Converter: A device that reduces vehicle emissions
• Use an OBD-II scanner to confirm the code.
• Inspect spark plugs and ignition coils.
• Check for vacuum leaks and inspect fuel injectors.
• Replace faulty spark plugs or ignition coils.
• Repair or replace damaged fuel injectors.
• Fix any vacuum leaks.
• OBD-II scanner
• Spark plug socket
• Multimeter
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly replace spark plugs.
• Use high-quality fuel.
• Perform routine engine maintenance.
Engine Performance
• Avoid driving the vehicle until repaired to prevent further damage.
• Consult a professional mechanic for accurate diagnosis.
Check with your vehicle manufacturer for warranty coverage on engine components.
This code has been associated with vehicles experiencing ignition system failures and is commonly reported in vehicles with high mileage.
High – Immediate attention is required to prevent engine damage.
Driving with a misfire can cause damage to the catalytic converter and increase emissions, which may violate emissions regulations.
• Engine at operating temperature
• Vehicle in park or neutral
The affected cylinder is located in the engine block, typically under the intake manifold.
Q: Can I drive with a P0363 code?
A: It's not recommended to drive with this code as it can lead to further engine damage.
Q: What happens if I ignore a misfire?
A: Ignoring a misfire can result in damage to the catalytic converter and reduced engine performance.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
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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
Relevant when catalyst-efficiency or emissions faults persist after proper diagnosis.
Catalyst-efficiency faults sometimes point toward converter problems after proper testing.
Catalytic converters are highly vehicle-specific and should not be purchased by code alone.
View options on Amazon
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.
View options on Amazon
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.