OBD-II code · Chassis
C0205 Stop Lamp Switch Circuit
The ABS or stability control module has detected a fault in the stop lamp switch circuit. The brake light switch tells the module whether the driver is braking and is used to coordinate ABS, traction control and cruise control.
Is it safe to drive with C0205?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyStop lamp switch failed or misadjusted
- PossibleWiring or connector fault
- Less likelyBlown stop lamp fuse
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1 h
- Emissions test
- Usually unaffected
- Parts involved
- Stop Lamp Switch, ABS Control Module, Cruise Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.