Q: I have code p0300 and p0301 how do I fix this or where do I start

asked by on

I have code p0300 and p0301 car misfires and seems like it will just shut off any suggestions on how to fix or where to start or what this mean
My car has an automatic transmission.

It sounds like you may have a problem with one or more cylinders misfiring. Engine misfires can be caused by many different problems and are generally caused by either a spark or fuel issue or in some cases, a combination of both. Spark related problems generally will result from things like ignition coils, crankshaft position sensor, spark plugs, spark plug wires or ignition modules not working properly. When the misfire results from a fuel related issue, this is commonly related to a lean fuel condition (lack of sufficient fuel supply to the motor). Fuel related misfires can be caused by many different things such as low fuel pressure, faulty or dirty fuel injectors, a faulty O2 sensor, a dirty or failing mass air-flow sensor, a faulty or dirty idle air control valve or a vacuum or intake leak. When the fuel supplied to the combustion chamber is insufficient, this results in an ignition (spark) that is igniting a less than balanced load of fuel and air. This results in a misfire or an explosion in the cylinder that is much less powerful than the other cylinders. This creates a loss of power that resonates throughout the motor additionally causing other problems with ignition and fuel timing. Due to the number of different things that may cause an engine misfire, the quickest and easiest way to diagnose this type of problem is to hook the vehicle up to a scanning tool which will download any potential fault codes that may have registered in the vehicle’s computer as a result of the poor running condition. I would recommend having an expert from YourMechanic come to your location to diagnose and inspect your vehicle.

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. I have code p0300 and p0301 how do I fix this or where do I start

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: cleaning the idle air control valve on a 01 nissan altima 2.4l

If you are having problems with the idle air control valve you may have to replace it. If you just want to clean it you would need to have it removed or use an induction cleaner tool to pull cleaner...

Q: I have replaced the camshaft position sensor on my 2007 Infiniti M35 and still have the slip and vdc lights on.

If the Check Engine Light was on with codes that pointed to these sensors and the codes were not cleared after the parts were installed this may be the reason the lights are still on. The check engine light could...

Q: Q: Where are the power outlets located?

It’s important that you be able to charge your cell phone and use other accessories while you’re in your car. To help you do that, Nissan has included two power outlets (both are 12v rated for 10 amps). Here’s where...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...