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.
Affected components
- Stop lamp switch
- Abs control module
- Cruise control module
Common causes
- High likelihood: Stop lamp switch failed or misadjusted
- Medium likelihood: Wiring or connector fault
- Low likelihood: Blown stop lamp fuse
Possible symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.