Normal Operation and Fault Conditions
WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty, 2019 Ford F-450 Super Duty, 2019 Ford F-350 Super Duty, and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
The ABS module uses a sensor mounted on the brake booster to monitor the vacuum in the brake booster. When a failure in the vacuum system occurs, the ABS sets a DTC, sends a message to the IPC to illuminate the red brake warning indicator, and the force required to press the brake pedal increases.
For engines equipped with a mechanical vacuum pump driven by the camshaft a pump failure or a leak in the vacuum hoses, check valve, seals, brake booster or front hublock (if equipped) can cause a failure in the vacuum system.
For engines not equipped with a mechanical vacuum pump a leak in the vacuum hoses, check valve, seals, brake booster or front hublock (if equipped) can cause a failure in the vacuum system.
DTC DESCRIPTION
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P050F:00 | Brake Assist Vacuum Too Low: No Sub Type Information | This DTC sets if either of these conditions exist. Condition 1: vacuum level in the brake booster is less than -10 kPa (-3 inch Hg) for more than 10 seconds and there are no ABS hydraulic pressure DTCs present and it has been more than 1 minute after engine start or vehicle speed is greater than 1.25 km/h (0.77 mph) for 10 seconds. Condition 2: vacuum level in the brake booster is less than -10 kPa (-3 inch Hg) for more than 1 second and there are ABS hydraulic pressure DTCs present and vehicle speed is greater than 1.25 km/h (0.77 mph) for 10 seconds. |