Hyundai i-30: Emission control system / Selective Catalytic Reduction

The Selective Catalytic Reduction (SCR) system is to catalytically convert NOx to Nitrogen and Water by using the reduction agent, the urea solution.

Urea gauge

The urea solution gauge indicates the approximate amount of remaining urea solution inside the urea solution tank.

❈ The urea gauge image pops up, whenever the ignition switch is pressed to the ON position.

Low urea warning message

The lack warning messages of Urea appear below Urea 5.4 liter. When the warning message "Low Urea" is displayed with SCR warning lamp (), the urea tank needs to be refilled. If not refilled for a considerable mileage, visual warning system will escalate the intensity by displaying the message "Refill Urea" with SCR warning lamp ().

In this case, the tank soon needs to be refilled. The remaining urea in the tank approaches to too low level the warning message "Refill Urea tank or vehicle will not start" with SCR warning lamp (). "xxx km(mile)" represents the remaining travel distance allowed, so do not continue driving to the limit of the remaining travel distance without refilling.

Otherwise, the vehicle can't be restarted once the engine is turned off by ignition key. Based on the driving pattern, environmental condition and road profile, the deducted remaining mileage may differ from the actual travel distance.

When "Low Urea" or "Refill Urea" message is displayed, add enough urea. When "Refill Urea tank or vehicle will not start" message is displayed, fill up enough urea. When "Refill Urea tank or vehicle will not start" message is displayed with SCR warning lamp (), the vehicle can't be restarted once the engine is turned off by ignition key. For the above cases, full replenishment is always recommended.

Malfunction with the SCR system

SCR system has malfunction due to disconnected electrical components, incorrect urea and so on.

"xxx km(mile)" represents the remaining travel distance allowed, so do not continue driving to the limit of the remaining travel distance without fixing the source of the malfunction. Otherwise, the vehicle can't be restarted once the engine is turned off by ignition key. In this case, we recommend that the system be inspected by a HYUNDAI authorised repairer.

Clearing the vehicle-restarting restriction

Once the inducement system reached to final status and disabled the vehicle restart, it will only be deactivated in case the urea tank is replenished or the malfunctions have been rectified. If the vehicle can't be restarted with "Refill Urea tank or vehicle will not start" message, refill enough urea, wait for minutes and try vehicle starting again. If vehicle starting is not possible regardless of urea level, we recommend that the system be inspected by a HYUNDAI authorised repairer.

Adding the urea solution

To refill the urea solution from the refill hose

1. Press the ignition switch to the OFF position.

2. Turn the urea solution tank cap in a counterclockwise direction to open it.

3. Fully insert the refill hose to fully add the ISO 22241-specified urea solution or above the mark on the urea solution tank.

❈ Pay the great caution not to add the urea solution into the fuel tank. If not, it surely applies adverse impact on the vehicle performance, causing various malfunctions.
❈ Never use the urea solution mixture with additives or water. It may allow foreign substances to enter the urea solution tank. If so, it surely applies adverse impact on the vehicle performance, causing various malfunctions.
❈ Use only the ISO 22241-specified urea solution. Any unauthorized urea solution surely applies adverse impacts on the vehicle performance, causing various malfunctions.

4. Turn the urea solution tank cap in a clockwise direction to securely close it.

To refill the urea solution from the refill bottle

1. Press the ignition switch to the OFF position

2. Turn the urea solution tank cap in a counterclockwise direction to open it.

3. Fully add the ISO 22241-specified urea solution or above the mark on the urea solution tank.

❈ Pay the great caution not to add the urea solution into the fuel tank. If not, it surely applies adverse impact on the vehicle performance, causing various malfunctions.
❈ Pay the great caution not to over-fill the (completely) fulfilled urea solution tank by force whilst refilling the urea solution from the refill bottle. The over-filled urea solution tank will be expanded when it becomes frozen and this can cause a serious malfunction of the urea solution tank or urea solution system.
❈ Never use the urea solution mixture with additives or water. It may allow foreign substances to enter the urea solution tank. If so, it surely applies adverse impact on the vehicle performance, causing various malfunctions.
❈ Use only the ISO 22241-specified urea solution. Any unauthorized urea solution surely applies adverse impacts on the vehicle performance, causing various malfunctions.

4. Turn the urea solution tank cap in a clockwise direction to securely close it.

Adding the urea solution: Every approximately 6,000 km (The urea solution consumption is dependent on the road profile, driving pattern and environmental condition)

❈ It takes some time to update the cluster gauges after the UREA injection.

WARNING

• Do not apply any external impact on the DPF system. It may damage the catalyst, which is equipped inside the DPF system.
• Do not arbitrarily modify or manipulate the DPF system by redirecting or lengthen the exhaust pipe. It may adversely impact the DPF system.
• Avoid contact with the drained water from the exhaust pipe. The water is slightly acid and harmful to skin. If contacted, thoroughly wash it.
• Any arbitrary manipulation or modification of the DPF system may cause a system malfunction. The DPF system is controlled by the complex device.
• Wait for the DPF system to cool down before the maintenance service, as it is hot due to the heat generation. Otherwise, it may case a skin burn.
• Add only the specified urea solution, when your vehicle is equipped with the urea solution system.
• The urea solution system (i.e. urea solution nozzle, urea solution pump, and DCU) operates for approximately 2 minutes more to eliminate the remaining urea solution inside, even after the ignition switch is pressed to the OFF position. Before the maintenance service, make sure that the urea solution system is completely turned OFF.
• The poor urea solution or the unauthorized liquids may damage the vehicle components, including the DPF system. Any unverified additives in the urea solution may clog the SCR catalyst and cause other malfunctions, which require the expensive DPF system to be replaced.
• When the urea solution contacts with the eyes or the skin, you should thoroughly wash the contaminated skin area.
• When you swallow the urea solution, thoroughly rinse your mouth and drink a lot of fresh water.Then, immediately consult a doctor.
• When your cloth is contaminated with the urea solution, immediately change your cloth.
• When you have an allergic reaction to the urea solution, immediately consult a doctor.
• Do not allow a child to contact the urea solution.
• Wipe off any urea solution spillage with water or cloth. When the urea solution is crystalized, wipe it off with the sponge or the cloth, which is dampened in the cold water. When the urea solution spillage is exposed in the air for an extended period of time, it is crystalized in white, damaging the vehicle surface.
• The urea solution is not the fuel additives. Thus, it should not be injected to the fuel tank. Otherwise, it may damage the engine.
• The urea solution is the aqueous solution, which is inflammable, non-toxic, colourless and odourless.
• Store the urea solution tank only in the well-ventilated locations. When the urea solution is exposed to the hot temperature at approximately 50°C for an extended period of time (i.e. under the direct sunlight), the chemical decomposition may occur, emitting the ammonia vapour.

Storing the urea solution

• It is improper to store the urea solution in the containers made with the certain materials (i.e. aluminum, copper, copper alloy, nonalloyed still, and galvanized steel). The urea solution dissolves the metal materials, severely damaging the exhaust purification system to be non-repairable.
• Store the urea solution only in the containers made with the following materials. (DIN EN 10 088-1-/-2-/-3-specified CR-Ni steel, Mo-Cr-Ni steel, polypropylene, and polyethylene)

Urea solution purity

• The following situations may damage the DPF system.
  - Fuels or any unauthorized liquids are added into the urea solution tank.
  - Additives are mixed in the urea solution.
  - Water is added to dilute the urea solution.
• Use only the ISO 22241- or DIN70070-specified urea solution. When any unauthorized urea solution is added to the tank, we recommend you to contact a HYUNDAI authorised repairer.
• When any unauthorized impurities enter the urea solution tank, it may occur the following problems.
  - Increased emission
  - Malfunction with the DPF system
  - Engine failure

Never add the used urea solution, which is drained from the tank (i.e. whilst maintaining the vehicle). Its purity cannot be guaranteed. Always add the new urea solution.

Specification of the tandard urea solution

Liquid such as diesel, gasoline and alcohol shall never be used for SCR system. Any fluid other than recommended urea solution (conform to ISO22241 or DIN70070) can damage SCR system hardware and deteriorate vehicle emission.

WARNING

• When opening the urea solution tank cap at high outside temperatures, ammonia vapours may escape. Ammonia vapours have a pungent smell and primarily cause irritation of the:
  - Skin
  - Mucous membranes
  - Eyes
  You may experience a burning sensation in your eyes, nose and throat, as well as coughing and watering of the eyes. Do not inhale ammonia vapours. Do not allow urea solution to come in direct contact with your skin. It is hazardous to your health. Wash any affected areas off with plenty of clean water. If necessary, consult a doctor.
• When handling with urea solution in closed space, ensure good ventilation. When the bottle of urea solution container is opened, pungent smelling fumes may escape.
• Keep urea solution out of reach of children.
• When urea solution overflows into vehicle surface, wash out vehicle surface with clean water to prohibit corrosion from occurring.
• When replenishing, be careful lest the urea solution should overflow.
• In case the vehicle was parked at very low ambient temperature (below 11 dgree Celcius) for a long time, the urea solution will be frozen in the urea solution tank. With frozen urea, the tank level may not be detected correctly until the urea solution will be defrosted by activated heater.
• The time to defrost the urea solution varies in accordance with driving conditions and outside temperatures.
• If defective urea solution or liquid that is not recommended is supplied, there may be damage on the parts of the vehicle such as processing device. If defective fuel is used, foreign objects will be accumulated to SCR catalyst and cause catalyst pushed away or breaking. After adding the incorrect urea solution, please visit the closest service centre as early as possible.
• Liquid that are not recommended such as diesel, petrol, and alcohol shall never be used other than the recommended urea solution that satisfy ISO22241 or DIN70070.
• If defective urea solution or liquid that is not recommended is supplied, there may be damage on the parts of the vehicle such as processing device. If defective fuel is used, foreign objects will be accumulated to SCR catalyst and cause catalyst pushed away or breaking.