Seat Leon models often face issues with the start/stop system failing to activate. This system is designed to save fuel by switching off the engine during stops and restarting it when needed.
Symptoms
- Start/stop indicator light turns on
- Engine doesn’t shut off at traffic lights or in traffic
- Noticeable increase in fuel consumption
Possible Causes
- Weak or old battery
- Faulty brake switch
- Start/stop sensor errors
- System disabled due to air conditioning or high electrical load
Solutions
- Test battery voltage and replace if needed
- Inspect and replace the brake switch
- Scan and clear start/stop sensor faults
- Reduce electrical load and test system again
Preventive Maintenance
- Regularly test and maintain the battery
- Keep electrical connections clean and secure
Advice
Most start/stop issues are battery-related. A weak battery will cause the system to deactivate itself.
