Cause
Dragging or binding brake caliper
A caliper not releasing fully, so the pad remains in contact with the disc. The drag is small enough not to be obvious and large enough to matter: it generates heat continuously, wears that pad and disc rapidly, and costs measurable fuel.
Its effect on the diagnostic systems is through wheel speed. A dragging corner turns marginally slower than the others, and the stability and traction systems compare speeds continuously — so a persistent small difference reads as slip and produces codes with no fault in any sensor. A wheel noticeably hotter than its opposite after a run is the confirming check and costs nothing.
Seized slider pins and corroded piston seals are the usual causes, along with a collapsed flexible hose acting as a one-way valve — that last one is worth knowing, since it lets pressure in and not out, so the caliper drags while the caliper itself is perfect. Check that the wheel spins freely with the vehicle raised and compare against the other side.
Typically specialist work. Needs equipment or training most home workshops do not have.
Codes this can cause (2)
Codes where this is a likely explanation first, rather than merely a possible one.
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Others who found this
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
Sign in or create an account to add what you found about Dragging or binding brake caliper.