B1676 on Ford
Battery Pack Voltage Out Of Range
B1676 on Ford vehicles indicates battery pack voltage out of range. Au7o has documented this code across 1 Ford model — most commonly on Explorer. 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. Typical repair costs on Ford range from $100 to $600, depending on the specific model and root cause.
Common Causes of B1676
- •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
B1676 on Ford by Model
Ford Explorer(1 issue)
- Parasitic Battery Drain From WiFi/APIM and Accessory Modules Causing Repeated Dead Batteries2016-2020
Owners report repeated dead batteries from a parasitic draw that exceeds Ford's ~50 mA key-off spec; affected Explorers have measured ~200 mA, killing a battery in about three days of sitting. Culprits traced on the forums include the in-vehicle WiFi hotspot/modem module, the APIM (SYNC) module not sleeping, an always-hot USB/media port back-feeding through plugged-in cables, and stuck door/dome circuits. Ford's factory battery is also widely criticized as short-lived (2-3 years), which masks the underlying draw until the battery gives out.
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View B1676 across all makes →Frequently Asked Questions
What does B1676 mean on Ford?▼
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. On Ford specifically, this code is documented across 1 model.
What causes B1676 on Ford vehicles?▼
Common causes on Ford: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B1676 on a Ford?▼
Repair costs on Ford range from $100 to $600, depending on the specific model and root cause.
Which Ford models have B1676 documented?▼
Au7o has documented B1676 on 1 Ford model: Explorer.