Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car is having trouble making the engine run smoothly because something is wrong with cylinder number 7 when using a different kind of fuel, like natural gas or ethanol.
This code indicates that the engine's cylinder 7 is experiencing misfires when running on alternative fuels.
A misfire in cylinder 7 has been detected when the engine is operating on alternative fuels. This could be due to issues with fuel delivery, ignition, or compression in that specific cylinder.
• Rough engine idle
• Decreased fuel efficiency
• Check engine light on
• Faulty spark plug in cylinder 7
• Fuel injector issue in cylinder 7
• Compression problem in cylinder 7
Cylinder: A chamber within the engine where fuel combustion occurs.
Misfire: A failure of the fuel in the cylinder to ignite properly.
• Check the spark plug in cylinder 7
• Inspect the fuel injector for cylinder 7
• Perform a compression test on cylinder 7
• Replace the spark plug in cylinder 7
• Clean or replace the fuel injector for cylinder 7
• Repair any compression issues in cylinder 7
• OBD-II scanner
• Spark plug wrench
• Compression tester
$150 - $500
Moderate
• Chevrolet Silverado
• Ford F-150
• Dodge Ram 1500
• Regular maintenance of spark plugs
• Use high-quality alternative fuels
• Regularly inspect fuel injectors
Engine Performance
• Avoid hard acceleration until repaired
• Use recommended fuel type
• Schedule a service appointment
Check with the vehicle manufacturer for specific warranty coverage related to engine components.
Misfire codes have been common with the adoption of alternative fuels, highlighting the need for precise fuel and ignition management.
Moderate – Should be addressed soon to avoid further engine damage.
Driving with a misfire can lead to increased emissions and potential engine damage. It is advisable to address the issue promptly.
• Engine running on alternative fuel
• Engine at operating temperature
Cylinder 7 is typically located on the driver's side of the engine, towards the rear, but exact location can vary by vehicle model.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to engine damage and decreased performance.
Q: Can I drive my car with this code?
A: It's possible to drive, but it's not recommended as it can cause further damage.
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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
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.