Code P2002 means the engine control unit judges the diesel particulate filter (DPF) less efficient than expected: in most cases it is clogged or full of ash, sometimes a sensor gives a wrong signal.
What code P2002 means
Diesel particulate filter efficiency below threshold (bank 1).
Typical symptoms
- Engine or DPF warning light on
- Frequent regenerations or regenerations that never finish
- Loss of power, sometimes limp mode
- Higher fuel consumption, fan always running
- Engine oil level rising
Most likely causes
| Cause | How common | What to do |
|---|---|---|
| Clogged filter or ash-saturated filter | Very common | Forced regeneration or professional cleaning |
| Differential pressure sensor or blocked sensing tubes | Common | Check and replace sensor or tubes |
| Exhaust temperature sensors | Common | Read in diagnosis and replace |
| Blocked EGR or out-of-tolerance injectors | Common | Clean or replace, then regenerate |
| Cracked or melted filter | Less common | Replace with an approved part |
How it is diagnosed
- Read soot and ash load and differential pressure.
- Check the sensors and the pressure sensing tubes.
- Attempt a forced regeneration while monitoring temperatures.
- Check upstream causes: EGR, injectors, oil.
Can you drive with code P2002?
For short trips yes, but do not postpone: the longer you wait, the more the soot compacts and the harder the filter is to recover, with a risk of limp mode. Do not switch the engine off during a regeneration.
How much does it cost to fix?
| Work | Indicative cost |
|---|---|
| Forced regeneration | €60-150 |
| Professional filter cleaning | €150-350 |
| Differential pressure sensor | €80-250 |
| Filter replacement | €600-800 up to over €2,000 |
Figures are indicative market ranges, useful for orientation: the real cost depends on model, engine, parts chosen and labour hours. For an exact quote we need the vehicle registration number.
How MasterTuning helps
We read the real values of the control unit, not just the code: that is the difference between finding the faulty component and replacing parts by trial and error. After the repair we clear the error and check that it does not come back. Find the nearest centre or contact us.
Got code P2002 on your car? Book a diagnosis at the nearest MasterTuning centre.
Frequently asked questions
What does P2002 mean?
That the efficiency of the particulate filter on bank 1 is below the expected threshold: usually the filter is clogged or full of ash.
Does regeneration fix P2002?
Often yes, if the filter is loaded with soot but intact. With a lot of ash it needs professional cleaning of the removed filter.
How much does it cost to fix P2002?
From €60-150 for a forced regeneration to €150-350 for cleaning; replacement starts at €600-800.
Can I just clear the code?
You can clear it, but it comes back if the cause remains. You have to fix why the filter keeps loading.
