What could cause a P0304 code?
P0304 Causes
Cylinder 4 misfires can be caused by many reasons from a faulty ignition system, fuel system, or internal engine failure. 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.
Is code P0304 serious?
You may report a P0304 code if your car indicates a misfire or an ignition or fuel system issue. As a result, it may result in an internal engine failure. This is a significant problem that requires immediate attention.
Can you drive with a cylinder 4 misfire?
An engine misfire can be caused by bad spark plugs or imbalanced air/fuel mixture. Driving with a misfire isn’t safe and can damage your engine.
How much does it cost to fix a cylinder 4 misfire?
Depending on the exact cause, it could be anywhere from $20 to $700 or more to fix a cylinder 4 misfire.
How do I fix code P0304?
What repairs can fix the P0304 code?
- Spark plugs replacement.
- Replacement of cap & rotor, coil pack, plug wires (depending on vehicle)
- Repair of engine mechanical issues.
- Fixing air leaks.
- Repair of fueling faults.
How serious is a cylinder misfire?
If left untreated, a cylinder misfire can lead to significant engine damage. Worse, if you experience a bad misfire while driving, it could result in an accident. This is why it’s important to treat engine misfires as soon as you detect them.
How do I know if my spark plug is misfiring?
Symptoms of misfiring spark plugs include rough idling, uneven power when accelerating, and an increase in exhaust emissions.
Can a misfire fix itself?
No, unless it is an external problem, engine misfire cannot fix itself.
Can engine misfires go away by themselves?
However, most misfires dissipate, and your engine regains its normal speed after a second or two. But even a single misfire is usually a sign that something else is wrong and that more misfires will likely occur in the future.
Which cylinder is P0304?
Cylinder 4 Misfire Detected
What Does the P0304 Code Mean? Diagnostic trouble code (DTC) P0304 stands for “Cylinder 4 Misfire Detected.” The code indicates that the powertrain control module (PCM) has counted enough misfire events on cylinder 4 to store the misfire code for that cylinder.
What is the most common cause of a misfire?
The most common causes of misfires are worn, improperly installed, and mishandled spark plugs, malfunctioning ignition coils, carbon tracking, faulty spark plug wires and vacuum leaks.
Will changing spark plugs fix a misfire?
Dirty or Old Spark Plugs
If your engine is misfiring, you may be able to fix the problem easily by replacing your spark plugs. Spark plugs are relatively easy to remove from engines and inspect for damage, and at less than $25 a piece, they are relatively cheap to replace, too.
Can low oil cause misfire?
Low engine oil can cause a misfire, and it is very likely that the cause of the misfire was indeed the low oil pressure in your vehicle. There are three common ways low oil can cause a misfire: Your oil filter is damaged, reducing oil flow, causing improper valve timing, and resulting in a misfire.
Can an overdue oil change cause misfire?
Long term, yes it will. Slacking on oil changes will clog the tiny oil return holes in the pistons with sludge and carbon.