P0302 Honda Accord
Cylinder 2 Misfire Detected · Powertrain Code · High · Repair: Moderate
What is P0302?
Misfire detected in cylinder 2. Typically caused by a worn spark plug, bad ignition coil, faulty fuel injector, or low compression in that cylinder.
When the Honda Accord triggers code P0302 (cylinder 2 misfire detected), it typically points to an issue in the powertrain system. This is a high severity code, so address it promptly to avoid further damage or safety concerns. Below you'll find the most common causes, symptoms, and repair options specific to the Honda Accord.
This repair is rated moderate, meaning some experience and specialty tools required.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your Honda Accord.
Common Causes on Honda Accord
- Worn or fouled spark plug on cylinder 2 (NGK ILZKR7B11S OE)
- Failed ignition coil pack on cylinder 2
- Carbon buildup on intake valves (direct injection 1.5T and 2.0T)
- Low compression on cylinder 2 from worn valve seals
- Leaking fuel injector on cylinder 2
Symptoms
- Check Engine Light flashing (active misfire)
- Engine shaking or vibrating at idle
- Loss of power and hesitation
- Rough idle
- Increased emissions and fuel smell
Notes for Honda Accord
On 1.5T and 2.0T direct injection engines, carbon buildup on intake valves is a primary misfire cause after 50k miles — a walnut blast service every 60k miles is recommended.