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P0300 Fault on 2004 Dodge Neon SRT-4: Cold Weather Triggered Misfire with No Performance Issues

Model: 04 Dodge Neon SRT-4 Fault Code: P0300 Posted: 2006-02-20 01:32

Last night, I let my 2004 Dodge Neon SRT-4 warm up because the temperature was below freezing. After going inside my friend's house and returning about 10 minutes later, I noticed the check engine light was on and the vehicle had thrown a P0300 code. This is not the first time—I previously experienced a P0301 code several months ago when starting the car in extremely cold weather. In that case, the code disappeared after a few days without any intervention. I’ve been told that due to the lower compression characteristics of the SRT-4’s turbocharged engine, misfires during cold starts are not uncommon. Since both incidents occurred during nighttime warm-up in very cold conditions, I believe this pattern is significant. The car runs normally—boost pressure is stable, acceleration is strong, and there are no noticeable engine noises or performance issues. I’ve carefully listened to the engine and do not detect any irregularities. However, since this is now my second occurrence of a misfire code, it has raised some concerns about underlying component wear or failure.

Related fault codes

P0300

Comments (3)

Anonymous 2006-02-20 07:02

It's common on 2004 Dodge Neon SRT--4s to experience spark plug and ignition wire failures by around 30,000 miles. I work at a dealership where we frequently service these vehicles—they're quite reliable but do have known wear points. Start with the basics: inspect the spark plugs and ignition wires. Use only Champion plugs recommended for this model and high-quality ignition cables—Taylor's brand is excellent; dealer-grade wires are acceptable, though Taylors typically last longer. I've also seen a few cases of TPS harness issues where the wiring rubs through, but that would require a more detailed inspection to confirm. Keep me posted as you investigate this issue. Jeff

Anonymous 2006-02-20 12:49

I started my car this morning and the check engine light was not on. I filled up with Shell V-Power, which is my usual fuel choice. After starting, the light remained off. I drove 36 miles to work without any issues. I recall reading that spark plugs can degrade relatively quickly in these vehicles—I’ve accumulated nearly 20,000 miles. Is this a common issue or just a coincidence related to extreme cold weather?

Anonymous 2006-02-20 15:03

Yes, around 20,000 miles is when spark plugs and ignition wires typically start showing signs of wear on the Neon SRT-4. Try replacing them first—this is one of the most common causes. Ignition wires may be covered under warranty, while spark plugs are usually less than $4 each. You can change them even before your hands get cold. Just a quick note: don’t ignore this issue—it will only worsen and could potentially damage the catalytic converter if left unaddressed.