C0072: Brake Temperature Too High (Subfault)

What it means

This code identifies a fault associated with excessive brake temperature. The specific failure depends on the diagnostic subtype.

At a glance

• Usually lights the ABS or stability-control warning light

How it works

Brake-temperature monitoring estimates or measures heat in the braking system so the vehicle can warn when braking is being stressed. This subfault code indicates that the monitored temperature has exceeded the system's limit; the subtype and stored data can help distinguish prolonged braking from a sensing or reporting issue.

Common causes

Most likely first.

1. Hard or prolonged braking, mountain descent

Symptoms

• Brake temperature warning may appear
• Brake performance may be reduced

How to diagnose it

1. Read the brake or stability module's subtype and freeze-frame data to see when the high-temperature condition was recorded.
2. If the brakes may be hot, stop in a safe place and allow them to cool without touching the wheels or brake components.
3. Once cool, inspect for smoke, unusual odour, fluid leaks, damaged brake parts, or a wheel that appears to be dragging.
4. Check live temperature data and any related sensor or wheel-speed codes to determine whether the reported heat is plausible.
5. If the warning returns without heavy braking, test the temperature-sensing circuit and brake components using the manufacturer's procedure.

Common fixes

• Allow the brakes to cool and change driving technique to reduce prolonged braking.
• Correct a dragging brake or other mechanical cause of excessive heat.
• Repair damaged temperature-sensor wiring or connections if readings are implausible.
• Replace a confirmed faulty temperature sensor or related component.

Can I keep driving?

If braking feels weak, pulls, smokes, or smells unusually hot, stop somewhere safe and let the brakes cool; do not continue downhill or at speed. Excess heat can reduce braking effectiveness and damage brake components.