Why is the ABS pump of Volkswagen Santana not pumping oil?

[CamillaLee]

Volkswagen Santana ABS pump not pumping oil is caused by ABS failure. Dirty sensor head: A dirty sensor head or contamination by magnetic substances can cause the wheel speed sensor to fail. If you find that the wheel speed sensor often malfunctions after driving through water, muddy roads, sandy roads, etc., you can try cleaning it and then checking. Consequences of wheel speed sensor failure: A faulty car wheel speed sensor can cause unstable engine idling. When starting the vehicle or slowing down to stop while driving, there may be momentary stalling or engine shutdown, reduced engine acceleration performance, incorrect speed display on the dashboard, and the engine warning light may illuminate. Function of ABS: The Anti-lock Braking System (ABS) automatically controls the braking force during car braking to prevent wheel lock-up, keeping the wheels in a state of rolling and sliding (with a slip ratio of about 20%) to ensure maximum adhesion between the wheels and the ground.