How to Manually Reset the Urea Warning Light?
2 Answers
Check if there is significant urea crystallization blocking the high-temperature catalytic pipe. Remove the exhaust elbow to clean soot deposits, replace the urea solution, and observe if the urea warning light disappears. Inspect the urea tank and urea pump for leaks, and check if the water heating valve is damaged or stuck in the open position. If leaks are found, replace the sealing rings. A high voltage signal from the urea pump pressure sensor or incorrect power supply to the sensor can also trigger the urea warning light. Replace the urea pump and power supply module connector to resolve this issue. Use professional tools to check if the urea injector is clogged. Clean or replace the urea injector as needed.
Manually clearing the urea warning light is quite simple. As a long-time diesel vehicle driver, I often encounter this issue, usually due to insufficient urea fluid or the system needing a reset. Manual procedure: First check the urea tank level and top up with AdBlue if low; after refilling, drive for 5-10 minutes and the light should go off automatically. If it remains on, try turning off and restarting the engine - some vehicles allow manual reset through the dashboard menu. Avoid prolonged driving with the light on as it may trigger limp mode and reduce power. For maintenance, check urea levels monthly to prevent contamination; in winter, pre-warm the filler pipe with warm air to avoid crystallization. These habits can prevent many headaches.
