P1684 — Battery Was Disconnected (memory cleared) — Informational
SAFEIs it safe to drive? Generally OK to keep driving — fix it at your convenience.
What P1684 means
This is a manufacturer-specific code — its meaning depends on the vehicle’s make (see below).
What P1684 means on specific makes
Dodge / Jeep / Ram / Chrysler SAFE
Not a fault. The PCM is noting that battery power was lost / memory was cleared within the last so-many starts (e.g., after a battery change or code clear). It clears itself. Don't replace anything for this code alone.
- Recent battery disconnect/replacement ($0)
- Recent code clear ($0)
- Intermittent battery/ground connection if it keeps returning ($0-50)
Check first: Ignore it after a known battery service; if it recurs on its own, check for a loose/corroded battery or ground connection.
Source: Allpar Chrysler list