What the Warning Means
An AdBlue countdown warning means the SCR emissions system has detected a fault or low fluid condition. If unresolved, many vehicles will refuse to restart once the countdown reaches zero.
Common Causes
- Low or contaminated AdBlue
- NOx sensor failure
- AdBlue pump or injector faults
- Tank heater issues
- SCR efficiency faults
Why Guessing Parts Gets Expensive
NOx sensors, tanks and pumps can be expensive. Live data and fault-code context should be checked before replacing anything.
Next Step
Book diagnosis while the vehicle still starts. It gives more time to confirm the fault and avoid being stranded.