What Does the Engine Code P0302 Mean?
If your car is displaying the engine code P0302, your engine’s cylinder two is misfiring. This poses a serious safety risk.
Written by Kevin Martinez
Reviewed by Melanie Reiff
If your car shows the engine code P0302, it may be due to your engine cylinder two not burning the proper amount of fuel required to energize your engine. You must get it checked the moment you notice the code, as it can pose a safety risk to your car’s driveability.
Your car communicates when it’s not functioning correctly through diagnostic trouble codes (DTCs). These DTCs serve as codes that can be read using an OBD-II.
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What does the engine code P0302 mean?
Definition: Cylinder 2 misfire detected
If you see the engine code P0302, that means that your car’s cylinder number 2 is experiencing a misfire. Usually, an
engine misfire
happens due to insufficient fuel burning in the cylinder, which is essential for a well-functioning engine.How much will it cost to fix?
The cost depends on the make and type of car you have and the mechanic you use. On average, though, most auto shops charge between $75-$150 per hour of labor and parts.
Your final total will depend on the exact nature of the work that must be performed.
What can cause the P0302 engine code?
If you run across the P0302 engine code, a misfire in your engine’s cylinder 2 is usually the main culprit. Common factors that may lead to a P0302 engine code include the following:
- Faulty or worn out spark plugs
- Incorrect fuel pressure
- Intake air leak
- Clogged or faulty fuel injector
Your car’s engine control module (ECM) will determine if there is a misfire in your cylinders by using the information provided from the
crankshaft position sensor
. From there, based on the various speeds of the crankshaft position, the ECM will determine if there is a misfire within the cylinder.Common symptoms of the P0302 engine code
The first sign of the P0302 tends to be your
check engine light
. While it may not seem serious at first, it’s important to bring your car for servicing once you notice the light to prevent any further damage.Other symptoms that may indicate trouble with your car’s cylinder include:
MORE: Does insurance cover engine failures?
How serious is the P0302 engine code?
Because it can cause further damage to your catalytic converter and ignition failure—among other things—it’s essential that you get this issue diagnosed and repaired as soon as possible.
Failure to get it checked promptly could pose a high safety hazard in terms of your car’s driveability.
Can I fix the P0302 engine code myself?
Although it might be cheaper to attempt to DIY fix the issue, it’s always best to have a licensed mechanic properly diagnose and check your car’s cylinders before you roll up your sleeves.
A mechanic will diagnose the issue by doing the following:
- Visually check for any visible signs of damage at the ignition coils or loose wiring
- Check the conditions of your spark plugs and spark plug wiring system
- Assess your car’s fuel system to see if there are problems with your car’s ability to regulate fuel properly
If all checks out and the problem is still present, your mechanic may perform an engine compression test or leak down test.
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