B1676: Battery Pack Voltage Out Of Range
2 vehicles · 2 makes · $100-$800 repair
Most Reported On
B1676 is an OBD-II diagnostic trouble code meaning “Battery Pack Voltage Out Of Range.” A control module reports that its supply voltage has left the acceptable operating window. Ford's published criterion is battery voltage below roughly 9.7 volts for more than about 210 ms with vehicle speed above 20 km/h (12 mph), or above roughly 18 volts at any time. It is a supply-quality code that many Ford-family modules can set, and it commonly appears as a companion code when a weak or degraded 12V battery causes voltage sag during cranking or during auto start-stop restarts. Because the code is set by whichever module saw the sag, it must be read together with that module's identity — when it is stored by the ABS module on Ford-family vehicles it is frequently caused by an internal module fault rather than the battery itself. This code is most commonly reported on 2024 Lincoln Nautilus, and 2016-2020 Ford Explorer, with repair costs ranging from $100 to $800.
Common Causes
Typical Repair Cost
Based on 3 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
B1676 does not use the standard P/B/C/U prefix. It may be a manufacturer-specific code, so verify that a scanner supports your exact year, model and module before buying.
Vehicles Affected (2)
FAQ
What does B1676 mean?
B1676 stands for "Battery Pack Voltage Out Of Range." A control module reports that its supply voltage has left the acceptable operating window. Ford's published criterion is battery voltage below roughly 9.7 volts for more than about 210 ms with vehicle speed above 20 km/h (12 mph), or above roughly 18 volts at any time. It is a supply-quality code that many Ford-family modules can set, and it commonly appears as a companion code when a weak or degraded 12V battery causes voltage sag during cranking or during auto start-stop restarts. Because the code is set by whichever module saw the sag, it must be read together with that module's identity — when it is stored by the ABS module on Ford-family vehicles it is frequently caused by an internal module fault rather than the battery itself.
What are the most common causes of B1676?
The most common causes of B1676 are: Weak, sulfated or end-of-life 12V battery (voltage sag under load or during auto-restart), Failing alternator / charging system, or overcharging producing high-voltage spikes, Corroded, loose or high-resistance battery terminals and ground straps, Blown module fuse, open or shorted module power/ground harness, Poor connector contact at the module; internal ABS module failure on some applications. The specific cause varies by vehicle.
How much does it cost to fix B1676?
Repair costs for B1676 range from $100 to $800, depending on the vehicle and root cause.
Which vehicles are affected by B1676?
Au7o has documented B1676 across 2 vehicle models from 2 manufacturers: Ford, Lincoln.
Sources (6)
- Forum'24 Nautilus major issue poll #1 — Do you have a problem with the battery?
- Forum2024 Nautilus software and battery issues — Lincoln Forums
- Forum12V Battery Consistently Low, 2024 Nautilus Reserve III Hybrid
- ForumLincoln Nautilus auto start/stop malfunction - Nautilus Talk Forum
- articleNautilus (19-20') Start / Stop Eliminator - 4D Tech
- NHTSANHTSA Manufacturer Communications Data Corpus
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.