Q: Q: Getting error code P0304

asked by on

The Check Engine light is on. I am getting error code P0304.

P0304 means the engine computer has detected a severe misfire on cylinder 4. This could be due to a bad ignition coil, spark plug, fuel injector, or valve train issue. If the issue is not resolved, further damage to the engine or catalytic converter will soon follow. I suggest having a qualified technician diagnose your Check Engine Light to fix and avoid more damage to the engine.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: Getting error code P0304

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car starts but dies a few seconds later. If I give it any throttle when it does start it kills the engine.

As a general rule, car engines do not like cold weather and do not do operate as well in cold weather. When you start your car in the morning and turn the key to on, the coolant temperature sensor immediately...

Q: Camshaft sensor issue on a '96 Tahoe

The first thing I'd advise doing is to go get yourself a sensor and put it on. A lot of times the sensors go bad, or when you pull it out, sometimes they get contaminated with oil so I'd start...

Q: Starter will not turn over, nor engage

Hi there, thank you for asking about your 2003 Infiniti FX45. The battery replacement has activated the "immobilizer" security feature. Consult your owners manual for instructions on how to disarm the system. Also, after replacing the battery, there is a...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...