SsangYong Rodius (2013 year). Manual - part 79

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1. CAUTIONS

1) Standard pattern of soot accumulation

Abnormal Soot Accumulation

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Normal Soot Combustion

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Cautions to protect the catalyst filter

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Use the designated fuel only.                                

Observe the recommended service intervals of engine oil.

Check the engine oil level frequently and add if necessary.               

Do not idle the vehicle unnecessarily.

Do not turn off the engine while the vehicle is running.                   

Do not shift the gear selector lever to neutral when going downhill.

Do not use improper engine oil or fuel additives.

Do not drive for a long time when the warning lamp is illuminated.

Make sure no flammable material, such as dry grass or tissue paper, contacts with the catalyst filter 

while the vehicle is parked.

For the vehicles used in urban traffic, driving on the expressways for more than 1 hour at least once 

per week is needed so that the PM inside CDPF isn't collected to one side only.

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2) Designated Engine Oil for CDPF (Low Ash Oil)

Need to use the designated engine oil for CDPF

1.

The smoke from the vehicle may generate the particle material in the ambient air. CDPF is the 

device to reduce the smoke by collecting and recycling it. To ensure the performance of 

CDPF, the designated engine oil should be used.

The smoke including combusted sulfur in fuel cannot be recycled in CDPF. This smoke 

generates the ash, resulting in clogging the filter.

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Advantages when using the designated engine oil for CDPF

2.

Reduces the amount of ash

Improves the fuel economy and reduces the CO2

Increases the life span of engine oil

Available for all engines (diesel and gasoline)

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Problems when using non-designated engine oil for CDPF

3.

Decreases the life span of engine oil due to accumulated ash in DPF (around 30%)

Decreases the fuel economy due to friction resistance, exhaust gas resistance and frequent 

recycling process of DPF

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The fuel containing high sulfur may cause the same problems.

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3) Do Not Use the Fuel Containing High Sulfur

Producing white smoke during recycling

1.

The sulfur in exhaust gas is changed to sulfate gas during exhaust process. This sulfate gas is 

shown as white smoke.

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Producing odor during recycling

2.

The sulfur after oxidation may produce the odor.

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Accumulation of ash

3.

The sulfur accumulated in DPF cannot be recycled. It reduces the life span of DPF.

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4) White Smoke

The white smoke can be generated when the exhaust gas is recycled in DPF. There are two reasons 

as below.

Saturated vapor

1.

Sulfate

2.

The vehicle equipped with CDPF system may generate the white smoke when using the fuel with 

high sulfur content (over 100 ppm). This is caused by the sulfur attached and accumulated in 

CDPF. However, this is very natural situation, not caused by your vehicle.

How to fix the problem 
Replace current fuel with high grade fuel as soon as possible. How­ever, even after 

replacing the fuel, the white smoke may be seen due to residual sulfur in CDPF system.   

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Overload of CDPF

(warning lamp blinking)

Excessive overload of CDPF

(warning lamp illuminated)

5) Warning Lamp Related to CDPF

CDPF regeneration process (warning lamp NOT illuminated)

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The CDPF system enters the regeneration mode 

when the driving distance becomes approx. 600 to 

1,200 km (may differ by the driving condition and 

driving style). Then, the engine ECU performs the 

CDPF regeneration operation. However, the driver 

is not informed with this operation by any engine 

warning lamp or vehicle signal, so he/she may not 

detect this operation. The control logic at the post-

injection dur-ing the regeneration process is to 

increase the fuel injection volume and control the 

intake air volume (by the throttle body) in order to 

increase the temperature of the exhaust gas. The 

driver may not feel any particular difference from 

the vehicle.

If the CDPF cannot reach the regeneration 

temperature due to low speed driving or other 

reason during the regeneration process, the soot is 

continuously accumulated in the CDPF. When this 

condition continues and the CDPF is overloaded 

with soot, the engine warning lamp blinks to inform 

this situation to the driver.

In order to solve this problem, drive the vehicle at a 

speed of approx. 80 km/h for 15 to 20 minutes to 

perform the CDPF regeneration process.

If the engine warning lamp on the instrument 

cluster blinks, the CDPF is overloaded. In this 

case, perform the step 2.

1.

2.

3.

If the vehicle is driven at a speed of 5 to 10 km/h 

for an extended period of time, the soot 

accumulated in the CDPF cannot be burned as the 

CDPF cannot reach the regeneration temperature. 

Then, an excessive amount of soot can be 

accumulated in the CDPF.

This case is much worse than the simple over-load 

of the CDPF. To inform this to the driver, the 

engine warning lamp comes on and the engine 

power is decreased to protect the system.

To solve this problem, blow soot between the 

engine and exhaust system several times and 

erase the related DTC. Then, check if the same 

DTC is regenerated again. If so, check the DTC 

related to the differential pressure sensor.

1.

2.

3.

OFF

Blinking

Illuminating

Blinking

Illuminating