Discover the common causes of the P0304 diagnostic trouble code and learn how to troubleshoot a misfire in cylinder 4 of your engine.

The P0304 code means that cylinder 4 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 4.

Nov 29, 2024 · If you’ve seen the P0304 code flash on your dashboard, you might be feeling a mix of confusion and concern. A misfire in cylinder 4 can lead to poor engine performance and …

Oct 6, 2025 · If your car's ECM throws a P0304 trouble code, you have a misfire problem. Here are common symptoms, causes, and how to fix DTC P0304...

Jul 8, 2024 · DTC P0304 indicates that a misfire has been detected in cylinder #4. Several problem areas can be at fault, including a bad spark plug or spark plug wires, a damaged …

Sep 7, 2024 · How to fix the P0304 code fast and prevent further engine damage? Discover essential steps to resolve cylinder 4 misfire effectively.

What does the P0304 code mean? The P0304 code signifies a cylinder 4 misfire detected by your vehicle’s onboard diagnostics system. When this code appears, it indicates that the engine …

In this case it's cylinder #4. A code P0304 may mean that one or more of the following has happened: If there are no symptoms, the simplest thing to do is to reset the code and see if it …

May 27, 2024 · The P0304 code indicates a misfire in cylinder 4. Read on to learn its symptoms, possible causes, as well as how to diagnose and fix the underlying issue.

Oct 30, 2024 · Here's everything you need to know to understand the check engine error code P0304, which indicates that the engine control module has detected a misfire in cylinder 4. …