Ford has decided that a safety defect exists involving the high-voltage battery packs inside certain plug-in hybrid vehicles—specifically the 2020–2024 Ford Escape PHEV and 2021–2024 Lincoln Corsair PHEV. At the center of the issue is a manufacturing defect inside one or more battery cells, which can lead to an internal short circuit and, in the worst cases, battery thermal venting or vehicle shutdown.
This problem originally surfaced years ago, was addressed by a previous recall, and now—based on new field data—Ford has determined that the prior fix may not have been enough.
What’s Causing the Problem?
Inside the high-voltage battery pack, each cell has a separator layer that keeps the cathode and anode apart. If this thin separator layer becomes damaged, the cell can short internally. Ford, its engineering teams, and the battery cell supplier have all pointed to variability in the supplier’s production process as the likely cause. This inconsistency may lead to small imperfections or weaknesses in the separator layer.
When the separator is compromised, the result can be:
- Internal short circuits
- Loss of propulsion power
- Battery overheating
- Thermal venting
- Potential vehicle fire
Ford has not yet identified the complete root cause. Tear down investigations are still ongoing.
Safety Risks: What Can Happen
If a battery cell shorts internally:
1. Loss of Motive Power While Driving
The vehicle may suddenly shut down its propulsion system.
A red “Stop Safely Now” warning appears on the instrument cluster.
Although steering, braking, and lights still work, a sudden loss of acceleration dramatically increases crash and injury risk.
2. Battery Thermal Venting / Fire Risk
A shorted cell can overheat and vent hot gas, which can ignite surrounding components.
This is a significant safety hazard, particularly if venting occurs during or after charging.
To date, Ford reports no injuries or accidents connected to this defect.
A Look Back: The 24V-954 / 24S79 Recall
Ford already attempted to fix this issue once.
In December 2024, Ford approved recall 24V-954 (Ford) / 24S79 (Lincoln), which rolled out the following remedy:
- Updated Battery Energy Control Module (BECM) software
- Added enhanced detection of battery cell anomalies
- Stopped battery charging automatically if anomalies were detected
- Alerted owners through messages in the instrument cluster
This fix was intended to catch separator-layer damage before it caused a short circuit. However, new field reports show this strategy was not always effective.
The Turning Point: New Thermal Venting Cases in 2025
July–August 2025
Three European Ford Kuga PHEV vehicles (the Kuga is the European variant of the Escape PHEV) experienced battery thermal venting even AFTER receiving the recall software update.
September 2025
Two more cases surfaced.
August–October 2025 Investigation
Ford’s Critical Concern Review Group (CCRG) opened a formal investigation on August 27, 2025.
Recovered battery packs and control modules showed:
- No detectable anomalies before venting
- Significant thermal damage making root-cause confirmation difficult
- The updated software did NOT trigger any warnings prior to failure
Meanwhile, tear down analysis from other replaced battery packs (those that were flagged by the software and did not vent) has not yet identified a definitive cause.
As of November 5, 2025
Ford reports:
- 7 total venting incidents, all from European Kuga PHEV vehicles
- All had already received the 24V-954 software update
- No injuries or accidents
November 7, 2025
Ford approved a new field action—leading to today’s recall.
The New Recall: 25SC4 (Ford) / 25V-789 (NHTSA)
Because of the new cases, Ford has issued a new recall to replace the old one.
Affected Vehicles:
- 2020–2024 Ford Escape Plug-In Hybrid
- 2021–2024 Lincoln Corsair Plug-In Hybrid
(These vehicles were previously included in recall 24V-954.)
Ford’s New Instructions to Owners
Until the final fix is ready, Ford advises:
- Only use Auto EV mode
- Limit the maximum charge of the high-voltage battery
- Wait for mailed instructions and further updates
Interim owner letters are scheduled to go out December 1, 2025, detailing the safety risks and how to limit battery charging. A second letter will follow once a permanent remedy is available.
The Final Remedy Is Still Under Development
Ford has not yet determined what the permanent fix will look like—likely because the underlying defect is still not fully understood.
Conclusion
Ford’s latest recall highlights an unresolved and potentially serious defect in the high-voltage battery cells used in its Escape and Corsair plug-in hybrid models. The original software-based solution from 2024 was not enough to catch every instance of cell separator damage, and new thermal-venting cases have forced Ford to develop a more comprehensive fix. Until that final remedy is completed, owners must limit charging, follow Ford’s interim instructions, and watch for important recall notices.

