How to Manually Reset the Urea Warning Light?

[StPeter]

Here are the methods to manually reset the urea warning light: 1. Vehicle lacks power, but urea consumption is normal. Replace the urea solution and test drive; the fault disappears. 2. Urea pressure is too low, and urea consumption is high. The urea tank has severe external leakage at the top. After replacing the urea tank assembly and urea pump, the leakage persists. Replace the water heating valve to resolve the issue. 3. Insufficient power, with urea consumption too high or too low. Check the urea pump power supply module. Replace the urea pump and power supply module connector. After replacement, recheck and clear the urea fault codes; only sensor power supply 3 cannot be cleared. Analysis shows sensor power supply 3 refers to the ECU internal power module. Replace the rail pressure sensor to resolve the fault.