More evident signs, however, include engine backfiring, excretions of fuel from the tailpipe, loss of electrical power, or hard engine starts. Or, your car may begin to show signs of bad performance, like vibrating or making noises when running because of rough running. Namely, you may notice that your gas mileage starts to become lower than what it usually is.
However, there are several other symptoms that indicate a misfiring cylinder that has to do with the performance of your vehicle. One of the most obvious symptoms a Toyota will display when the P0304 code issue occurs is a light indicating a need to service the engine. The good thing to note is that you can detect all of these issues and diagnose them if you look at the symptoms your car is displaying. Other causes of the code P0304 include malfunctioning spark plugs, clogged fuel injectors, an intake air leak, bad fuel pressure (issues with fuel pressure sensor), or poor cylinder compression. Or, you might have similar malfunctions with the fuel injector related to the misfiring cylinder. This problem can also occur due to issues with related parts in the vehicle’s engine.įor example, you could have issues with the vehicle’s ignition coil, such as a shorted harness or a bad electrical connection in the circuit. Misfiring cylinders aren’t always caused by a malfunction in the cylinder itself. While the cause for a P0304 code (misfiring cylinder) isn’t always the same, there are some common factors that create this issue.
Read also: How to Fix a P0401 Code on Mitsubishi (Step by Step) Causes of the P0304 Code on Toyota This issue could cause your vehicle to lose power while driving, or worse – cause your car to break down on the road. It’s also dangerous to drive with a misfiring cylinder in your engine. Therefore, if you get a P0304 code on your car, you should look into fixing the issue immediately.Īt worst, this issue could lead to a ruined engine if left unfixed. It’s pretty common in Corolla models specifically, where it indicates a misfire in cylinder 4.Įngine misfires are a serious cause for concern with any vehicle you drive, Toyotas included.
The first thing to note is that a P0304 is a common code indicating an engine misfire in Toyotas. If you receive the auto code P0304 on your Toyota vehicle, your first thought is likely to wonder what this code means.