C1001 on Ford: How to Diagnose & Fix
ABS Hydraulic Pump Motor Circuit
1 Ford model · 1 documented issue
C1001 on Ford by model: symptoms, diagnosis and fix
Owners report the large SYNC 4 touchscreen going black or freezing, and the rearview/backup camera failing (black or frozen image) when shifting into reverse. Ford has acknowledged a SYNC 4 freeze-in-reverse defect (software versions ~1.7-1.9) affecting many 2021-2024 vehicles including F-150 (recall 25S49 / NHTSA 25V315). Many cases clear with a soft reset or software update; recurring failures are traced to a failing APIM module (or, for camera-only faults, the camera or IPMA) requiring replacement/repair.
Common Symptoms
- Center touchscreen goes black or stays dark after startup
- Screen freezes or reboots randomly
- Backup camera shows black or frozen image in reverse
- Loss of climate/audio/drive-mode controls
How to Fix
First try a soft reset (hold steering-wheel Volume-Down + Seek-Forward for 10-15 seconds) or a software update. For persistent blackouts, dealers replace the APIM; camera-only faults may need coax/IPMA repair. Typically covered under warranty.
Sources for this issue (3)
C1001 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 C1001 mean on a Ford?
C1001 stands for "ABS Hydraulic Pump Motor Circuit." This chassis/brake code points to a fault in the ABS hydraulic pump motor circuit. The pump motor pressurizes brake fluid so the ABS (and often stability control) can rapidly apply and release the brakes during a skid. When the control module detects that the motor isn't running correctly, draws abnormal current, or has a circuit fault, it sets this code and typically disables ABS, leaving you with normal (non-anti-lock) braking. It usually traces to the pump motor, its power supply, or wiring within the ABS unit. On Ford it is documented across 1 model: F-150 Lightning.
What are the most common causes of C1001?
The most common causes of C1001 are: Faulty ABS hydraulic pump motor, Blown fuse or faulty pump motor relay, Poor power or ground to the pump motor, Corroded, loose, or damaged motor connector, Damaged wiring in the pump motor circuit, Internal fault in the ABS hydraulic control unit, Failed ABS control module. The specific cause varies by vehicle.
How much does it cost to fix C1001 on a Ford?
Repair costs vary widely with the root cause and Ford model; each issue on this page carries its own estimate where one is published.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.