Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Ford GTFACTORY OEM SERVICE PROCEDURE
Anti-Lock Brake System (Abs) And Stability Control
- Description And Operation
- Anti-Lock Brake System (ABS) and Stability Control - Overview
- Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description
- System Diagram
- Network Input Message Charts
- Anti-Lock Brake System (ABS) Function
- Electronic Brake Force Distribution (EBD)
- Supplemental Braking Assist
- Advance Trac
- Disabling Advance Trac
- Selectable Driving Modes
- Launch Control
- Stability-Traction Control Indicator (Sliding Car Icon)
- Stability-Traction Control Disabled Indicator (Sliding Car OFF Icon)
- Electric Parking Brake Features
- Component Description
- Diagnosis And Testing
- Anti-Lock Brake System (ABS) and Stability Control
- DTC Charts
- Symptom Chart
- Pinpoint Tests
- Pinpoint Test A: U3003:16
- Pinpoint Test B: Wheel Speed Sensor Erratic Signal Faults
- Pinpoint Test C: U0140:00
- Pinpoint Test D: U3003:17
- Pinpoint Test E: U0151:00
- Pinpoint Test F: C0020:16, C0020:17, C0020:49
- Pinpoint Test G: U0100:00, U0104:00
- Pinpoint Test H: Wheel Speed Sensor Electrical Faults - Front
- Pinpoint Test I: Wheel Speed Sensor Electrical Faults - Rear
- Pinpoint Test J: The Traction Control System Is Inoperative Or Cannot Be Disabled
- Pinpoint Test K: C0040:24, C0040:64
- Pinpoint Test L: Vacuum Pressure Sensor Faults
- Pinpoint Test M: U0131:00
- Pinpoint Test N: U0155:00
- Pinpoint Test O: U3002:62
- Pinpoint Test P: Stability Control Sensor Signal Faults
- Pinpoint Test Q: Brake Vacuum Supply Faults
- Pinpoint Test R: The Launch Control System Is Inoperative
- Pinpoint Test S: Abs (Anti-Lock Brake System) False Activation, Abs (Anti-Lock Brake System) Too Sensitive, Abs (Anti-Lock Brake System) Activates On Normal Stop
- Pinpoint Test T: The Brake Vacuum Pump Runs All The Time Or Never Runs
- Pinpoint Test U: U0122:00
- Pinpoint Test V: U0146:00
- Pinpoint Test W: U0126:00
- Anti-Lock Brake System (ABS) and Stability Control
- Removal And Installation
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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