DPF Regeneration Tips and Advice Checklist

Are you looking for tips and advice on regenerating a Diesel Particulate Filter DPF?

■ If the DPF light comes on, it needs regenerating (see manufacturer’s hand book).
■ If the engine management light comes on and the glow plug light flashes then you will not be able to regenerate the DPF by driving.
■ ‘Limp home’ mode will engage, with a maximum of 3,000 RPM.
■ Check pressure sensors. There could be a build up of water.
■ Examine pressure pipes for damage. They must be clean or could freeze in extreme temperatures due to water build up.
■ Check that the EGR system is working correctly.
■ Check that the vehicle has the correct spec engine oil.
■ Check the additive (active system) Eolys/Cerine.
■ If the DPF is not regenerated and fills to over 90% or 45 grams, the component will need replacing. This is not covered under warranty.
■ It is advisable that the ECU is readapted to zero when a new DPF is fitted. This is to ensure that the ECU knows that the DPF is now empty, otherwise the ECU will be recording the soot values of the old DPF.


The DPF will not regenerate if:

■ Engine management light is on for any fault.
■ Faulty EGR valve.
■ If there is less than 20 litres of fuel in the fuel tank or if the fuel light is on then regeneration will not take place.
■ If you drive with your foot on the clutch pedal.
■ In order to carry out a static DPF regeneration use the correct diagnostic machine. Ensure the vehicle is in park/neutral, and the hand brake is on. The bonnet must be closed, and the foot pedals should not touched, as the diagnostic machine will keep the engine at 1,500 RPM until the operation is complete.
■ This operation could take up to 40 minutes