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2002 Chrysler Neon P1684 and P0303 Codes: Battery Disconnection & Cylinder Misfire Explained

Model: 2002 Chrysler Neon Fault Code: P1684 Posted: 2007-08-05 15:01

I'm experiencing both P1684 and P0303 diagnostic codes on my 2002 Chrysler Neon. The P1684 code indicates that the battery was disconnected within the last 50 vehicle starts, while P030,

Related fault codes

P1684

Comments (2)

Anonymous 2007-08-07 11:03

The P0303 code typically points to a secondary ignition issue—such as a faulty spark plug, worn wire, or defective coil. For the P1684 battery disconnection warning, ensure your battery cables are in good condition and show no significant voltage drop. Also verify that they do not have emergency (or reverse) connectors attached, which can interfere with proper grounding.

Anonymous 2007-08-09 10:24

The P1684 code might be triggered by an improper code-clearing procedure—such as using a scan tool that doesn't follow the manufacturer's recommended steps. Make sure you're clearing codes correctly to avoid false or persistent warnings.