You probably have frozen brake caliper slider pins or a frozen brake caliper piston on one side.
buy new brake pads
Most cars have 4 brake pads in the front two per side of the car
You need to check for caliper slide.....if the caliper does not slide evenly, the wear will be uneven. If your slide bolts are gummed up, rusty or seized, you will get uneven brake wear.
Your V brakes may be rubbing on one side due to misalignment of the brake pads or the wheel. Adjusting the brake pads or realigning the wheel should help resolve the issue.
The brake pad wear sensor is on the brake pads. On my 318ti, the sensor is on the left side, on the inboard pad.
Probably has a sticky brake caliper or sticky brake caliper sliders. Who ever replaced the brake pads should have seen that.
2 on each side, the box will conatin all 4 pads.
Worn brake pads or a defective wheel bearing. If it only growls under braking it is the pads. If it growls all the time and more so when making a turn it is the wheel bearing. Inspect your brake pads/rotor and wheel bearings if necessary.
Your bike brake may be rubbing on one side due to misalignment of the brake pads, a bent rotor, or a loose brake caliper. Check and adjust these components to fix the issue.
You need to check your brake pads or the sensor wire on your brake pads could have snapped
you have to replace the pads or on one side of car they will be two wires going to the brake pads chops these join them together this will put light out
If only one wheel is grabbing, check the opposite side for problems like a frozen caliper, pinched brake line, a restricted brake hose or a bad grease seal allowing grease to get on to the rotor.