Before removing the defective DPF from the vehicle
A DPF blocking is usually a symptom of a problem further upstream. This guide will help you to find the fault as well as giving instruction about how to remove and replace the DPF.
The first area of investigation should be an oil check, checking the level and also the quality. If the level is too high, this should be drained to a suitable level prior to DPF removal. If the level is too low, the reason for this needs to be investigated. Oil quality checks should ascertain that there is no water or other contaminant within the oil.
The vehicle’s ECU does not detect all vehicle faults and it is the responsibility of the mechanic to check all other components within the emissions aftertreatment system, prior to replacing the DPF.
Components that could be at fault, causing the DPF to fail are;
All of these components should be checked by using a diagnostic tool, as well as a physical inspection.
- EGR Valve
- Lambda / Oxygen Sensor
- DPF Pressure Sensor
- Exhaust Temperature Sensor
- Air Mass Sensor
- Glow Plugs
- Fuel Injectors
- Throttle Body / Intake Manifold Flap
Removing and Replacing the DPF
- Using a diagnostic fault code reader, take note of the fault code displayed
- Clear the fault from the vehicle’s ECU
- For your own safety, disconnect the battery (refer to vehicle manufacturers handbook)
- Raise the vehicle to gain access to the DPF
- Remove any covers, remove all sensors. Mark the inlet and outlet hoses of the DPF Pressure Sensor, as incorrect replacement will result in the vehicle displaying fault codes
- Remove clamps, gaskets and mounting brackets
- Remove the DPF from the vehicle
- Following removal of the faulty unit, clean the connecting pipes on the vehicle
- Clean or replace the hoses between the DPF Pressure Sensor
- Install your new Eminox DPF using the supplied fitting components
- Refit all of the sensors that were removed
- Connect the battery
- Check the vehicle for any faults stored, reset if necessary
- In the DPF menu, reset the soot/ash content to zero ‘0’ and operate a controlled forced regeneration
- Check the exhaust system for any leaks
- Register your DPF to validate the warranty at www.eminox.com/aftermarket/warranty