How to Manually Reset the Urea Warning Light?
4 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.
The urea warning light indicates a system fault that requires attention. The common manual reset method is to promptly refill the urea and reset the circuit. I recommend first checking the urea tank with a dipstick and filling it to over 80%; if the light persists, drive a short distance to allow self-check reset. Some vehicles require long-pressing a specific button or disconnecting/reconnecting the OBD interface to clear fault codes. Never ignore this warning light, as it may lead to emission violation fines and damage to the SCR catalyst and engine efficiency. Economically, urea is inexpensive but fault repairs can be costly. Preventive measures include using genuine AdBlue, avoiding water dilution, and regularly performing full vehicle scans at authorized service centers for added security.
Manually eliminating the urea warning light is quite simple: refill the urea to the normal level, then drive normally for a few minutes and the light may automatically turn off. If it doesn't go out, you might need to use a diagnostic tool to read the fault code for manual clearing; avoid randomly disconnecting the battery as it carries significant risks. Common causes include insufficient urea or sensor issues, and ignoring them may lead to engine power reduction or excessive emissions. Make it a habit to check the fluid level during regular maintenance to reduce the chances of the light coming on unnecessarily.
