> Find a RepairPal Certified Shop Near You How Much Does It Cost to Fix Code P0304? These shops can not only help you figure out what’s going wrong before you waste time and money on the wrong parts, but they also offer a minimum 12-month, 12,000-mile warranty and stand behind all their estimates with guaranteed fair pricing. If your vehicle is misfiring and you’re not comfortable diagnosing this issue at home, we recommend finding a RepairPal certified shop nearby to pinpoint the problem and give an accurate estimate for repairs. With a cylinder 4 misfire fault, the first step is to get it diagnosed to figure out what is causing the engine to misfire. Commonly associated with error code P0300.The most common reason for this to happen is faulty or worn-out spark plug coil packs, especially if it’s been a while since you had a tune-up. P0304 CausesĬylinder 4 misfires can be caused by many reasons from a faulty ignition system, fuel system, or internal engine failure. P0304 indicates that cylinder 4 is experiencing misfires. A misfire typically occurs when the timing of this ignition is off. Power is generated by pistons that move up and down while fuel is ignited at very specific times. Most engines have a 4, 6, or 8-cylinder engine, where more cylinders typically mean more power. Your vehicle moves when gasoline is burned and power is generated inside a chamber known as the cylinder. Common Reason: Code P0304 is often related to spark plug and plug wire issues.Because there are so many variables that could cause a misfire, the best cost savings is to find a trustworthy shop that can diagnose code P0304 as quickly and accurately as possible. Diagnosis: A multiple misfire can be caused by anything from faulty spark plugs to low engine compression.Repair Urgency: Fix this code immediately (same-day if possible) to avoid serious engine damage and dangerous driving conditions.Do not keep driving with this error code. P0304 definition: Cylinder 4 Misfire Detected.

Combustion misfire cylinder 4