Ford Mustang Mach-E

The Mach-E ER RWD is part of Ford Recall 23S56 for overheating HV contactors during rapid DC charging. 2021–2022 models are particularly affected.

Symptoms: HV battery warning, power reduction, charging fault, vehicle has no drive

Main HV battery contactors can overheat with frequent DC fast charging. All ER models before May 2022 affected; dealer replaces the battery switch box (approx. 5 hours labour).

Symptoms: Powertrain fault warning, sudden power loss, vehicle enters limp mode.

Ford recalled 2021–2022 Mach-E vehicles due to possible overheating of the HV battery main contactors. Repeated DC fast charging or performance driving can deform the contacts. Fix: OTA or dealer software update.

Symptoms: Vehicle suddenly loses drive power while moving; difficulty starting after DC fast charge; warning messages in instrument cluster after multiple hard acceleration runs.

The 12V auxiliary battery system on the Mach-E ER RWD shows the same well-known discharge problems as the SR variants. Periods of standing over several days without charging can drain the 12V battery.

Symptoms: Electrical system fault warning, no start, charging process aborts

The battery thermal management on the Mach-E ER RWD without a heat pump reaches its limits at extreme temperatures (heat/cold). Winter range and charging speed in heat can be severely restricted.

Symptoms: Reduced winter range, slow charging in heat, battery conditioning warnings

The Mach-E's 12V auxiliary battery is only recharged when the HV battery is being charged. With long periods of standing without HV charging, it discharges. The software charging system is insufficient to maintain the 12V battery fully.

Symptoms: Warning 'Service required due to electrical system discharge' in FordPass app; vehicle shows 'System Off to Save Battery'; vehicle will not start.

The Mach-E's 12-volt auxiliary battery doesn't charge during HV charging. In cold conditions in particular it can fully deplete and lock the vehicle — doors, control units and start no longer function.

Ford recalled Mach-E vehicles because the main contactors (relays) of the high-voltage battery could overheat during repeated DC fast charging or full power demand, leading to malfunctions.

Ford recalled over 315,000 Mach-E vehicles (model years 2021–2025): if the 12V battery drops below 8.4V, the electronic door latches (e-Latch) lose power. Passengers can become trapped. A PCM software update resolves the issue.

Consumer Reports withdrew its recommendation for the Mach-E due to poor reliability. Frequent software faults affect charging, apps, ADAS systems and climate control. OTA updates help but don't permanently resolve all issues.

Mach-E owners report unreliable AC charging. Charging stops without error messages or doesn't start at all. The cause is partly a software fault in the on-board charger (OBC), partly failed charging control units. Ford released several OTA fixes.