← Back to list

P-1684 Diagnostic for 2000 Dodge Neon 2.0L: Battery Disconnected in Last 50 Starts?

Model: 2000 DODGE NEON 2.0 Fault Code: P1684 Posted: 2006-11-24 14:53

I'm troubleshooting a P-1684 diagnostic code on my son's 2000 Dodge Neon 2.0L engine. The code is P-1684, which according to the vehicle trouble codes section means 'Battery Disconnected Within Last 50 Starts.' I've already replaced the camshaft position sensor (P-0340), but this issue persists. I'm wondering if there's a connection between these two codes—could the battery disconnection be related to the camshaft sensor failure? Has anyone else experienced this on a 2000 Dodge Neon with a 2.0L engine? The website is very helpful—I just signed up after getting lost in the forums for over an hour. I'll definitely return and contribute more when I have further updates. Any insights or experiences would be greatly appreciated.

Related fault codes
P1684
Comments (5)
Anonymous 2006-11-24 15:17

P-1684: Battery Disconnected Within Last 50 Starts. Have you recently replaced or disconnected the battery? This could explain why the code is triggered, especially if the vehicle has been restarted multiple times after a disconnect.

Anonymous 2006-11-24 16:21

Have you completed replacing the camshaft position sensor (P-0340) yet? It's possible that a faulty sensor could contribute to misfires or code persistence, especially if it's related to timing issues.

Anonymous 2006-11-26 01:02

I replaced the sensor and found that battery removal was necessary for better access—though I had to cut through heater hoses, which wasn't ideal. The car now runs fine. I noticed oil in the electrical connector, possibly enough to cause a short. Could this have been the root issue? Drying out the connector might have helped, but since I replaced the sensor, I'm not certain. Still, it's worth considering as a potential cause.

Anonymous 2006-11-26 12:50

Camshaft sensors can degrade over time, and if the O-ring fails, oil may seep into the electrical connector—this could lead to short circuits or intermittent faults. Jeff, who is a Chrysler technician, might offer more insight on this specific issue.

Anonymous 2006-11-27 09:38

While oil contamination in connectors is possible, I haven't personally encountered a case where cleaning the connector resolved the P-1684 code. A battery disconnection or sensor failure seems more likely as the root cause.