P0303 Honda Cr-V
Cylinder 3 Misfire Detected · Powertrain Code · High · Repair: Moderate
What is P0303?
Misfire detected in cylinder 3. Typically caused by a worn spark plug, bad ignition coil, faulty fuel injector, or low compression in that cylinder.
When the Honda Cr-V triggers code P0303 (cylinder 3 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 Cr-V.
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 Cr-V.
Common Causes on Honda Cr-V
- Worn spark plug on cylinder 3 (NGK OE iridium)
- Failed coil-on-plug ignition coil for cylinder 3
- Carbon deposits on cylinder 3 intake valves (DI engines)
- Fuel injector fault on cylinder 3
- Valve adjustment needed (especially on older K-series engines)
Symptoms
- Flashing Check Engine Light during active misfire
- Vibration felt in steering wheel and cabin
- Loss of power
- Rough or uneven idle
- Fuel smell from unburned fuel in exhaust
Notes for Honda Cr-V
Honda recommends valve adjustment every 60k miles on K-series engines — tight valves are a common misfire cause that is often overlooked.