Battery Disconnected Within Last 50 Starts (Chrysler)
What does P1684 mean?
The P1684 code means the vehicle's onboard diagnostic system has detected: Battery Disconnected Within Last 50 Starts (Chrysler). This is a low severity code.
Common Symptoms
- Check Engine Light on
- No drivability symptoms
- Code appears after battery replacement
- Code appears after battery disconnect for repairs
- Stored code with no active symptoms
Probable Causes (Ranked by Likelihood)
- Battery was recently disconnected or replaced Very High
- Battery cable was loose causing intermittent disconnect High
- Battery went completely dead Moderate
- PCM power supply circuit interruption Low
Step-by-Step Diagnostic Procedure
-
Verify if the battery was recently disconnected or replaced. This code is informational on Chrysler vehicles.
-
Check battery cable connections for tightness and corrosion.
-
Measure battery voltage with engine off (12.4V+) and running (13.5-14.5V).
-
Drive the vehicle through 50 start cycles and the code will clear itself.
-
If the code persists after 50 starts without battery disconnect, check for parasitic drain or PCM power issues.
Frequently Asked Questions
Is P1684 a real problem?
Usually no. It is an informational code that Chrysler vehicles set whenever battery power is lost. It clears itself after 50 successful start cycles.
Should I worry if I just had my battery replaced?
No. This is completely normal after a battery replacement or disconnect on Chrysler, Dodge, and Jeep vehicles.
Can I clear this code with a scan tool?
Yes, you can clear it immediately. However, if the battery connection is still intermittent, it will return.