B1676 on Lincoln: How to Diagnose & Fix
Battery Pack Voltage Out Of Range
1 Lincoln model · 2 documented issues · 1 critical · $250-$800 repair
B1676 on Lincoln by model: symptoms, diagnosis and fix
Roughly 46% of polled 2024 Nautilus owners (both ICE and hybrid) report repeated dead 12V batteries, sometimes with as little as 200 miles on the odometer. Two software-related causes identified: (1) Vehicle Dynamics Module stays awake and holds the CAN bus active after key-off (CSP 24P14), and (2) Driver Status Monitor Camera Module software keeps running after vehicle is off (CSP 24P08). A separate hardware-level fix for affected vehicles involves replacing the audio amplifier and 12V AGM battery when parasitic draw remains out of spec after the CSPs are applied.
Common Symptoms
- no-start after sitting overnight
- clicking when pressing start button
- dim dome lights
- battery low message
- needs frequent jump start
How to Fix
Have dealer apply software updates CSP 24P14 (VDM reprogram) and CSP 24P08 (Driver Status Monitor Camera Module reprogram), test 12V AGM battery state-of-health, and measure parasitic draw. If draw still exceeds spec, request audio amplifier replacement and a new battery — both covered under bumper-to-bumper warranty. An OTA update consolidating these fixes is anticipated.
Sources for this issue (3)
Nautilus owners frequently report the Auto Start-Stop system behaving erratically — failing to engage, failing to auto-restart smoothly at the light, or throwing a system-fault/malfunction message. The most common root cause is the 12V battery state-of-charge falling below the threshold the system needs (the AGM start-stop battery degrades faster than a conventional battery), so the system disables itself or restarts roughly. The popularity of plug-and-play 'start-stop eliminator' modules for the Nautilus reflects how much the behavior annoys owners.
Common Symptoms
- Auto Start-Stop won't shut the engine off at stops
- Rough or delayed engine auto-restart
- Start-Stop 'not available' or fault message
- Feature works intermittently / disables itself
- Frequent dead or weak battery
How to Fix
Test the 12V battery and charging system; replace a weak or aged AGM battery with the correct spec and perform a Battery Monitoring System (BMS) reset so the PCM relearns state-of-charge. Ensure parasitic-draw and software are current. Owners who simply dislike the feature use the dash defeat button each drive or a plug-and-play disable module (not a repair, a preference).
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Duralast Platinum H7/94R AGM battery, 850 CCAOEMH7-AGM / AutoZone 319458
Replace a failed 12-volt start-stop AGM battery after charging-system and draw/BMS diagnosis Fitment/availability: Live In Stock/Add to Cart page identifies H7-AGM, BCI 94R, AGM technology, 80 Ah, 850 CCA and matching terminal layout. Fo…
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Sources for this issue (2)
B1676 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does B1676 mean on a Lincoln?
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 Lincoln it is documented across 1 model: Nautilus.
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 on a Lincoln?
Published repair estimates on Lincoln range from $250 to $800 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for B1676 on a different make?
View B1676 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.