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.
Pinpoint Test U : P050F:00: Notes
Normal Operation and Fault Conditions
The vacuum pump is mechanically driven by the camshaft. The ABS module uses a sensor mounted on the brake booster to monitor the vacuum. A vacuum pump failure or a leak in the vacuum hoses, check valve, seals, brake booster or front hublock IWE can all cause insufficient vacuum for brake booster operation.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P050F:00 | Brake Assist Vacuum Too Low: No Sub Type Information | This DTC sets if the 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 Diagnostic Trouble Codes (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 Diagnostic Trouble Codes (DTCs) present and vehicle speed is greater than 1.25 km/h (0.77 mph) for 10 seconds. |
Possible Causes
- Vacuum hoses
- Front hublock IWE vacuum hose connection
- Brake master cylinder seal
- Check valve grommet
- Vacuum sensor grommet
- Check valve
- Brake vacuum pump
NO RELATED
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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.