OBD-II code · Powertrain (generic)
P0724 Brake Switch B Circuit High
Brake Switch B Circuit High: the signal voltage is above the expected range. Often an open circuit or a short to supply voltage.
Is it safe to drive with P0724?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBrake switch defective
- PossibleWiring open
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1 h
- Emissions test
- Usually unaffected
- Parts involved
- Brake Switch, Switch Wiring
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.