Dodge P1684: Battery Recently Disconnected — Fix
On Dodge vehicles, P1684 means the battery was disconnected or went dead within roughly the last 50 engine warm-up cycles — an informational note, not a fault in itself.
- Applies to
- Dodge vehicles
- Est. repair cost
- $0 – $50
- Time to fix
- 30 minutes – 2 hours
What it means
The usual cause is a recent battery disconnect, a dead/replaced battery, or a jump-start that reset the module memory. P1xxx codes are manufacturer-specific — P1684 is defined by Dodge (not part of the generic SAE J2012 set), so this applies to Dodge vehicles. Clear it with a scan tool after any repair.
Symptoms
- P1684 stored with no drivability symptom
- Often appears with reset adaptive settings
- Follows recent battery work
How to fix it
- 1
Confirm it is just informational
1. If you recently disconnected or replaced the battery, P1684 is expected. 2. Clear it with a scan tool.
- 2
Check charging if it recurs
1. If it keeps returning without battery work, test the battery and charging system.
Frequently asked questions
Is P1684 a problem?
No — it just records that the battery lost power recently (disconnect, dead battery, or jump-start). Clear it; only investigate if it keeps returning on its own.
Last updated July 19, 2026
Guidance only — always consult a qualified professional or the official service manual before carrying out repairs.