Skip the auto shop - Our mechanics make house calls

Q: Sputtering issue with car

asked by on

My mechanic has changed several parts like the spark plugs, fuel filter, airflow sensor, and it still sputters. When the Check Engine light flashed on, it said P301. What does that mean and what is causing this problem?

Code P0301 stands for cylinder #1 misfire. There are numerous potential causes for this code and your symptoms. If that is the only code stored, you’ll want to focus on items specific to the #1 cylinder, such as the fuel injector, coil pack and spark plug.

The fuel filter and mass airflow sensor would be more likely to affect all cylinders. I suggest you take your vehicle to a different mechanic for proper diagnosis of the Check Engine Light. The team at YourMechanic is an excellent option since we make house calls.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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: rattling noise when engine idles. load engine noise during acceleration like glass packed muffler

This may be related to loose exhaust parts such as exhaust mounting brackets, or potentially a bad or failing catalytic converter. As you may know, the catalytic converter has a honeycomb-like structure inside of it which helps to convert toxic...

Q: My car is sputtering

Hello - while a small hole in the exhaust will have an irregular exhaust noise to it, your symptoms sound more like a misfire on one or more cylinders. This could be caused by bad plugs, wires or coils. Other...

Q: Car cranks but won't start

Hey there: In most cases, when an engine won't start but the starter engages and cranks the engine over, it's due to a fuel delivery or ignition system malfunction. There are more than a dozen individual components that could cause...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...