Burgos - Spain

What are the particulate filter problems and their causes?

Particulate filter problems

Particulate filters and catalytic converters are components that are susceptible to problems and failures over time.

The maintenance of the aftertreatment system is proving to be a very effective way to more expensive than tyre maintenanceThis makes it possibly the most expensive maintenance item for vehicles.

The price of new particulate filters is prohibitive, and no one wants to have their vehicle idle or run the risk of a major breakdown.

When particulate filters were first installed in vehicles, the assumption was that they would be a self-contained, self-maintaining component that would take care of itself without causing too many problems and breakdowns.

Over time, it has been shown that this is not always the case.

Contents on particulate filter problems

What are the problems with the particulate filter and what are the causes of malfunctions?

The list of particulate filter problems is long:

  1. ILeaky nozzles
  2. Excessive idling
  3. Leaking exhaust pipes
  4. Problems at the manifold seals
  5. Refrigerant leakage
  6. EGR (exhaust gas recirculation) cooler leaks
  7. Metering valve problems
  8. Turbo problems
  9. Sensor malfunctions

These are some of the faults that can cause DPF problems and are also problems that can feed back into each other such as turbocharger failure.

What are the causes of particulate filter failures?

Because of the way we drive in cities nowadays, the scheduled regenerations are not completed in many cases, which leads to major problems.

Diesel particulate filters are subject to a lot of vibration and possible impact damage, and care must be taken.

It should also not be forgotten that all systems upstream of the particulate filter that have a problem will have an impact on the particulate filter, such as turbo failures.

What can be done to keep the particulate filter in good condition?

They should be inspected regularly to detect possible damage, cracks and breaks, due to bouncing or impacts while driving.

It is also advisable to inspect and clean the sensors and their contacts exposed to ensure that they have good electrical connections and are not attached to contaminants that could cause false fault codes.

It is strongly recommended to carry out periodic checks of oil and coolant levels.

In previous generations of engines, oil and coolant leaks were obvious due to exhaust smoke.

All of that is trapped in the DPF now, so monitoring oil and coolant usage (and using the correct oil formulation) is critical now.

If either of these is chronically low or there are signs of contamination, there is a high risk of clogging the particulate filter and catalytic converter, which increases the back pressure.

What happens if the particulate filter problem has progressed to a malfunction?

particle filter failure

First, it would be necessary to analyse where the problem comes from and its cause.

If the particulate filter is repaired and the problem persists in a component upstream of the exhaust treatment system, it will fail again.

Therefore, the first step would be to find out the cause of the problem.

Once, we know the cause, we would have to look at the damage to the particulate filter.

Is the ceramic melted, can it be cleaned, does the particulate filter need to be replaced?

If we have been lucky, the most economical thing to do is to carry out a cleaning to remove all soot and ash and restore the particulate filter to working order.

This can be done with particulate filter cleaning machinesThe initial values can be restored, provided that there is no damage.

For more information, do not hesitate to send us a message!


Post A Comment

Shall we talk?
Hello, how can we help?
Hello ?
How can we help you?