TORQDEX // BRAKE DIAGNOSTIC
One Wheel Overheating
Diagnose a single overheating wheel by checking calipers, brake hoses, parking brake components, bearings, and dragging brake conditions.
01 // WHAT IT MEANS
Understanding the symptom
A single hot wheel usually indicates that the brake is not releasing correctly.
A sticking caliper, restricted hose, parking brake issue, or mechanical drag may be responsible.
02 // QUICK CHECKS
Check these first
Start with simple observations and scan data before moving into deeper testing.
Compare wheel temperatures
Identify whether one wheel is significantly hotter than the others.
Inspect brake release
Check whether the brake remains applied after pedal release.
Inspect caliper movement
Verify piston and slide operation.
Check parking brake operation
Rear brake drag may come from parking brake components.
03 // SYSTEMS TO CHECK
Common systems involved
Brake release
A sticking caliper can keep brake pressure applied.
Hydraulic restriction
A failed hose can trap pressure at the wheel.
Rear brake operation
Parking brake mechanisms can create constant drag.
Wheel bearing condition
Bearing problems can also create heat.
04 // DIAGNOSTIC ORDER
Diagnose it in this order
Compare wheel temperatures
Confirm the affected corner.
Inspect brake assembly
Check pads, rotors, calipers, and hardware.
Test hydraulic release
Determine whether trapped pressure is present.
Check mechanical components
Inspect parking brake and bearing operation.
Verify repair
Confirm normal temperature after operation.
05 // TEST RESULTS
What the results may indicate
Check caliper or hose
A hydraulic or mechanical release problem is likely.
Check wheel components
Bearing or tire-related heat may be present.
Check parking brake
Rear brake mechanisms may be dragging.
06 // COMMON MISTAKE
Don't continue driving with a severely overheating brake
Excessive brake heat can damage rotors, pads, bearings, and other components.
07 // RELATED OBD-II CODES
Related trouble codes
08 // RELATED TORQDEX TOOLS