Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the engine's computer has detected that cylinder number 7 is not working properly, and it has stopped sending fuel to it to prevent damage.
The engine control module (ECM) has detected a misfire in cylinder 7 and has cut off fuel to that cylinder to prevent further damage.
P1355 indicates that the ECM has detected a misfire in cylinder 7. A misfire occurs when the air-fuel mixture in the cylinder does not ignite properly. To prevent potential damage to the catalytic converter and other engine components, the ECM cuts off fuel to the affected cylinder.
• Rough engine idle
• Engine hesitation or jerking
• Decreased fuel efficiency
• Check Engine Light illuminated
• Loss of power
• Faulty spark plug in cylinder 7
• Defective ignition coil
• Fuel injector issues
• Vacuum leak
• Low engine compression
ECM: Engine Control Module
Misfire: Failure of the air-fuel mixture in a cylinder to ignite properly
Catalytic Converter: An emissions control device that converts harmful gases into less harmful ones
• Scan the vehicle for codes and note any related codes.
• Inspect the spark plug and ignition coil for cylinder 7.
• Check the fuel injector for proper operation.
• Conduct a compression test on cylinder 7.
• Inspect for vacuum leaks.
• Replace the spark plug for cylinder 7.
• Replace the ignition coil if faulty.
• Clean or replace the fuel injector.
• Repair any vacuum leaks found.
• Address any compression issues.
• OBD-II scanner
• Spark plug socket
• Compression tester
• Multimeter
• Fuel injector cleaning kit
$150 - $500
Moderate
• Toyota Camry
• Chevrolet Silverado
• Ford F-150
• Regularly replace spark plugs.
• Perform routine engine maintenance.
• Use quality fuel.
Engine Performance
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional.
• Avoid driving with a misfire to prevent further damage.
Check with your vehicle manufacturer for warranty coverage on engine components.
Misfire codes have been common since the introduction of OBD-II systems, as they help prevent damage to the catalytic converter.
High – Driving with a misfire can damage the catalytic converter and reduce engine performance.
Ignoring this code can lead to increased emissions and potential engine damage, which may not comply with emissions regulations.
• Engine at operating temperature
• Under load conditions
Cylinder 7 is located on the engine block, typically on the driver's side for V-type engines.
Q: Can I drive with a P1355 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 damage the catalytic converter and decrease engine performance.
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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.
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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.