What is the fault indicated by fault code P0302 on the Besturn B50?
3 Answers
Fault code P0302 on the Besturn B50 indicates a misfire detected in cylinder 2. Cylinder misfire: A cylinder misfire refers to the phenomenon where the air-fuel mixture fails to combust properly in the cylinder during engine operation due to various reasons. If the Engine Control Unit (ECU) detects a misfire that could potentially damage the catalytic converter, the malfunction indicator lamp will flash, and the engine should be shut off immediately at this point. Causes of cylinder misfire: Potential causes include ignition system failure, fuel delivery issues, air leaks in the intake manifold or EGR/PCV system, mechanical cylinder faults, etc.
Hey buddy, you need to pay attention. The fault code P0302 on the Besturn B50 indicates an issue with the spark plug in the second cylinder, meaning the spark plug isn't firing properly or misfiring when you step on the gas. Common causes include a burnt or aged spark plug, a faulty ignition coil, insufficient fuel supply due to a clogged fuel injector, low cylinder compression, or a failed sensor like the crankshaft position sensor. In this case, the car will shake noticeably, driving unsteadily like it's drunk, and fuel consumption will spike. I once drove a friend's car with this issue, and the repair wasn't expensive—just replacing the spark plugs and coils fixed it. But don’t delay, or you might damage the catalytic converter, which could cost thousands to fix. The Besturn B50’s engine is temperature-sensitive, making this problem more likely on long trips. I suggest you take it to a reliable repair shop ASAP—don’t skimp on the small cost. Also, a reminder: regularly replacing spark plugs with higher-quality ones can prevent this issue.
I remember once when I was driving my Besturn B50 for a trip, the engine light suddenly came on. The scanner showed a P0302 trouble code, which turned out to be a misfire in cylinder #2. It caused severe engine shaking and noticeable power loss during acceleration. After checking, I found the causes are mostly carbon buildup on spark plugs or short circuits in ignition coils. Sometimes clogged fuel injectors can also trigger this issue. I find it quite annoying as it makes driving feel unsafe, especially on highways where sudden engine stall could be dangerous. Now I've learned my lesson - I inspect the ignition system every 20,000-30,000 km. Spark plugs have limited lifespan anyway, and replacing them only costs around 100-200 RMB. Besturn B50's ignition module requires extra attention in maintenance, as poor fuel quality easily causes problems. I suggest you address it promptly to avoid ending up like me spending unnecessary money on repairs after delaying it.
