The P0302 engine code, also known as a diagnostic trouble code (DTC), indicates that the powertrain control module (PCM) has detected frequent misfires in cylinder 2 of your vehicle's engine. Misfires can happen when the air-fuel mixture in the combustion chamber doesn't ignite properly, which can be caused by a number of issues. Some common causes include: A faulty fuel injector or injector circuit, A malfunctioning coil pack, A worn spark plug, and Engine timing. Symptoms of a P0302 code include: Poor engine performance, A rough or choppy engine, A strange smell, and A flashing check engine light. Some common fixes for a P0302 code include: Replacing the spark plugs, Replacing the ignition coil pack, Cleaning or replacing the fuel injectors, Replacing faulty components like valve cover gaskets, and Replacing the cylinder head gasket. You can also check for loose connections between the spark plugs, spark plug wires, the coil, and the distributor. You can also look for frayed wires and check the spark plugs for signs of fouling with oil or fuel. If your vehicle has individual coil packs at each cylinder, you can try removing one coil pack from the misfiring cylinder and one from a working cylinder. You can also check the fuel pressure to make sure each cylinder is getting the right amount of fuel. A cylinder misfire can be a serious issue that could damage your engine, so it's important to get it inspected and fixed quickly if you suspect you have one.
2004的Civic. 很后悔没用家里另一辆车。
离机场10mile 时开始不时有点抖，心惊胆战开到了long term parking lot.下车用随车带的仪器测到p0302. 过几天回家还要开50mile. 大家请支招，如何安全回家。
回家后拆spark plug 观察。
走local走走停停，反而要求发动机更加努力工作。
可能可以开附件Autozone买一套线圈。一般是线圈问题；如果是火花塞，那的跑的很秃了。
https://www.autozone.com/ignition-tune-up-and-routine-maintenance/ignition-coil/p/duralast-multi-pack-ignition-coil-c1460-4/667857_0_0?searchText=coil
https://www.oreillyauto.com/detail/c/walker-products/ignition---tune-up/ignition-coil/ignition-coil/90c5da72ae86/walker-products-ignition-coil/wlk3/92120264/v/a/17898/automotive-car-2004-honda-civic?q=ignition+coil&pos=0
安全些
而是高速上车发动机输出功率相对恒定而且绝大多数时间比在local上小，车能坚持更长时间，也更小概率趴窝。要是担心，开在最外道随时准备靠边就行。
tool to replace one or both of them at the parking lot.
Best regards,
Alex
The P0302 engine code, also known as a diagnostic trouble code (DTC), indicates that the powertrain control module (PCM) has detected frequent misfires in cylinder 2 of your vehicle's engine. Misfires can happen when the air-fuel mixture in the combustion chamber doesn't ignite properly, which can be caused by a number of issues. Some common causes include: A faulty fuel injector or injector circuit, A malfunctioning coil pack, A worn spark plug, and Engine timing. Symptoms of a P0302 code include: Poor engine performance, A rough or choppy engine, A strange smell, and A flashing check engine light. Some common fixes for a P0302 code include: Replacing the spark plugs, Replacing the ignition coil pack, Cleaning or replacing the fuel injectors, Replacing faulty components like valve cover gaskets, and Replacing the cylinder head gasket. You can also check for loose connections between the spark plugs, spark plug wires, the coil, and the distributor. You can also look for frayed wires and check the spark plugs for signs of fouling with oil or fuel. If your vehicle has individual coil packs at each cylinder, you can try removing one coil pack from the misfiring cylinder and one from a working cylinder. You can also check the fuel pressure to make sure each cylinder is getting the right amount of fuel. A cylinder misfire can be a serious issue that could damage your engine, so it's important to get it inspected and fixed quickly if you suspect you have one.
如果你不放心，可已吧第二缸的火花塞的線拔掉。
4缸車，只有三缸可用，我開過。 馬力小點，沒其他問題。