Cylinder 2, one of the chambers where fuel burns, is misfiring. A misfire means it is not burning its fuel well, and raw fuel can harm the catalytic converter, the exhaust part that cleans the fumes.
Old spark plugs are a common cause. On many cars you can swap this cylinder's ignition coil with a neighbor's. If the code moves to the other cylinder, the coil is bad.
We rate P0302 as Get it checked this week. It is not an emergency yet, but it can get worse. If the light starts flashing, stop driving soon.
Engine is misfiring in cylinder 2. Cylinder 2, one of the chambers where fuel burns, is misfiring. A misfire means it is not burning its fuel well, and raw fuel can harm the catalytic converter, the exhaust part that cleans the fumes.
We rate P0302 as Get it checked this week. It is not an emergency yet, but it can get worse. If the light starts flashing, stop driving soon.
The most common causes, in order: A worn spark plug in that cylinder; A weak ignition coil or spark plug wire for that cylinder; A dirty or failing fuel injector for that cylinder; A vacuum leak near that cylinder; Low compression from a worn valve or piston rings, which is a costly repair.
Estimates only. A mechanic should confirm. The same code can mean slightly different things on different cars; the app explains it for your exact year, make, model and mileage.