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P0304 and P0440 Fault Codes - 2003 Dodge Neon Diagnosis and Repair Costs

Model: 2003 Dodge Neon Fault Code: P0304 Posted: 2006-10-29 13:24

My 2003 Dodge Neon has persistent fault codes P0304 (Misfire Detected - Cylinder 4) and P0441 (Incorrect Evaporative Emission System Purge Flow). I've already replaced the spark plugs and ignition wires, but the P0304 code returns. The vehicle runs roughly at stoplights. Additionally, the P0441 code indicates a problem with the evaporative emission system purge flow. I have an appointment scheduled with a repair shop this week. Can anyone provide insight into potential causes or estimate typical repair costs? I'm looking for reliable information to help prepare for the visit.

Related fault codes
P0304P0441
Comments (3)
Anonymous 2006-10-30 08:34

Repair costs could range from over $100 to under $1,000. We don't provide official quotes here—each case varies due to parts availability, labor rates, and technician expertise.

Anonymous 2006-11-04 14:20

I took my car to a mechanic, and they identified a possible burned valve in cylinder 4 as the root cause of the misfire.

Anonymous 2006-11-04 16:49

This issue is relatively rare on a 2003 Dodge Neon, so it may point to a specific mechanical or sensor failure rather than general wear.