My 2002 dodge neon has check engine light with coded p0302. I know to try replacing the plug/wires, are there any other common causes for this error code that I should check out?

P0301 - Cylinder 1 Misfire Detected

Misfire repair

The repair depends on the cause. The key is to have the problem diagnosed properly. Once you know what caused the engine to misfire, you will know what it needs. Don't start by throwing new parts at it. Even if you planning on doing repairs yourself, it's not a bad idea to have the vehicle properly diagnosed at a dealer or reputable repair facility, where technicians have access to up-to-date information, technical service bulletins (TSB) and advanced scan tool.

The cost of repair will obviously depend on the problem. For example, if the misfire is caused by a bad on-plug ignition which is quite common on many newer cars, the repair might involve replacing a bad coil.


I suggest to exchange coil #1 with Coil #2 and then scan to see if the code is p0302.

That is the coil on top of the plug. You have to remove the wire and the screw.

I would

How do you know the coil pack is bad ? Did you test it , or are you going just by the P0302 - P0300 ? These codes do not mean the coil pack is bad ! Could have a vacuum leak , could have weak fuel pump , partially plugged fuel filter ! The engine could have a mechanical fault , burnt valve , bent valve , bad head gasket ! Sounds like you need stop wasting your money an take it to a pro !

Most major auto parts stores will connect a code reader to the plug the vehicle has-----it will read the error for the Check Engine and also can clear the check engine--does not fix the problem but the error code read will indicate in a general way why the light came on---my experience here is first hand---most of the time it will be a error related to the emission control system.

Get the code read and take it from there.

There are other good experts here so with the code post again if need further help.

Have you had somebody clear the codes after you installed the parts.If not the codes have to be erased by using a scan tool.

mass air and tps would be 2 most common causes.

SCAN VECHICLE WITH CODE SCANNER FOR FAULTY CAMSHAFT SENSOR OR FAULTY CRANKSHAFT SENSOR. THEY WILL CAUSE NO SPARK PROBLEMS.

Trouble Code: P0605

Internal TCM Error
Possible Causes:


PCM needs to be replaced, and then reprogrammed

COULD BE CYLINDER MISFIRE.YOU CAN TAKE CAR TO AUTO ZONE.THEY WILL SCAN IT FREE. TO SEE WHAT TROUBLE CODE YOUR PCM IS GIVING YOU.

For some reason neons require Champion brand plugs,like the one's from the factory. Also check the plug wires. If it's also got a nasty oil leak on the driver's side the cam sensor is probablt the culprit,causing the misfire.

This is typically a sign of a "detrimental misfire". A blinking check engine light means DON'T DRIVE ME! You may want to have your coil pack checked, plugs replaced or gapped properly, or wires replaced. Would also have to do with the camshaft sensor causing your timing to be off.