What does P2002 mean on a diesel car?

P2002 means the engine computer thinks the diesel particulate filter is not trapping soot as well as it should. It usually works this out from a soot sensor after the filter or from a pressure difference across the filter that is lower than expected, so the cause can be a cracked or melted filter, a filter that has been removed, or a pressure sensor or hose giving a falsely low reading. On most makes it does not mean the filter is blocked: blockage has its own codes, such as P2463 and P244B. VW group cars are the main exception, where P2002 can also be set by a loaded filter.

Can I drive with P2002?

Only gently and only as far as a workshop. If the filter is cracked, the car is emitting soot it is meant to trap, which can push the smoke opacity measured at a periodic inspection over the limit, and whatever overheated the filter can damage its replacement too. On makes that also use this code for a loaded filter, backpressure can build and push the engine into reduced power. Book it in within days, not weeks.

Will a DPF clean or a motorway drive fix P2002?

Not if the filter is cracked or melted: a clean removes soot and ash but cannot repair the filter, and a motorway run only helps a filter that is loaded with soot. On cars that use P2002 for a loaded filter, a forced regeneration or an off-car clean can clear it. If the cause is a split or disconnected sensor hose or a faulty pressure sensor, the repair is cheap and the filter can stay. That is why the hoses and the sensor are checked before anyone quotes for a new filter.

How much does it cost to fix P2002?

It depends on the cause. A pressure sensor costs 70 to 240 EUR fitted, cleaning out or replacing the sensor hoses 40 to 140 EUR, and an exhaust leak repair 90 to 350 EUR. Where the code reflects a loaded filter, a forced regeneration is 60 to 150 EUR and a professional clean 180 to 480 EUR. A cracked filter has to be replaced: about 700 to 1,500 EUR fitted for an aftermarket type-approved filter and 1,000 to 3,600 EUR for a new OEM one.

Can a cheap OBD2 reader fix P2002?

It can read and clear the code and show the freeze frame, which is useful for seeing when the fault set. On most cars it cannot show the pressure across the filter, the soot load or the regeneration history, and it cannot run a forced regeneration or adapt a new part; those need manufacturer-level software. Clearing the code without fixing the cause only brings it back.

Is it legal to remove the DPF in Europe?

No. Removing the filter invalidates the emissions type approval the car was registered under, so it is prohibited across the EU. A car found without its DPF is exactly what an inspector has grounds to reject, and fines can be significant, though the checks and the penalties are set by each country rather than centrally. The vehicle may also be refused insurance cover.

P2002: Diesel Particulate Filter Efficiency Below Threshold (Bank 1)

Quick Answer

Not safe to drive

P2002 means the engine computer has decided the diesel particulate filter is no longer trapping soot as well as it should. Depending on the engine, it judges this from a soot sensor after the filter or from a pressure difference across the filter that is lower than expected for the exhaust flow, so the usual causes are a cracked or melted filter, a filter that has been removed or emptied, or a pressure sensor or hose fault that makes the filter look that way. A filter clogged with soot normally sets different codes, such as P2463 or P244B, although some manufacturers, VW group among them, use this code more broadly. P2002 is the code for bank 1, which on most diesels is the only particulate filter; P2003 is the bank 2 twin on engines with two filters.

Severity: High · Emissions
Estimated repair cost: From €40 to €3600+, varies by vehicle

€40 or €3600, depending on your car.

Clean, refit or replace blocked or split pressure sensing hoses€40–€140
DPF replacement (new OEM)€1000–€3600

A scan shows whether P2002 is really stored on your car, which codes sit next to it and how urgent each one is. You can do this parked, with the ignition on.

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What does P2002 mean?

P2002 is a emissions-related diagnostic trouble code classified as high severity.

Where it is on the car

Exhaust temperature sensors
Oxidation catalyst (DOC)
Diesel particulate filter (DPF)
DPF pressure sensor and its two tubes
AdBlue line and injector
SCR catalyst

What are the symptoms of P2002?

Check engine light on
Often no change in how the car drives
Black soot at the tailpipe or on the back of the car, most visible under hard acceleration
Exhaust emissions check failed at a roadworthiness test
DPF warning light or reduced power on some models
P244A or P226D stored at the same time on some cars

What causes P2002?

Cracked or melted filter substrate, for example after a regeneration that overheated it
: high
Split, disconnected, blocked or swapped pressure sensor hose giving a falsely low reading
: high
Faulty DPF differential pressure sensor
: medium
Exhaust leak between the engine and the filter
: medium
On makes that use the code more broadly: filter overloaded with soot or ash that regeneration has not cleared
: medium
Excess fuel or soot reaching the filter (leaking injector, faulty exhaust fuel injector on engines that have one), which can overheat it during regeneration
: low
Filter removed, emptied or replaced with a non-approved part
: low

Is it safe to drive with P2002?

No - address this immediately. Drive gently and only as far as a workshop. A cracked or damaged filter lets soot out of the exhaust, which can push the smoke opacity measured at a periodic inspection over the limit, and on some makes, VW group cars among them, this code also covers a filter that regeneration has not cleared, where backpressure builds and the engine can drop into reduced power. Have the cause found within days, and do not switch off in the middle of a regeneration.

How do you diagnose P2002?

Read all stored codes and the freeze frame with an OBD2 reader. Note whether P244A (pressure too low), P226D (filter missing), P244B or P2463 (pressure too high, soot build-up) sit alongside P2002, because they say whether the filter looks empty or full. A generic OBD2 reader can show these codes, the freeze frame and standard live data, but on most cars not the pressure across the filter, the soot load or the regeneration history, and it cannot run a forced regeneration or an adaptation: those need manufacturer-level software or a workshop.
Inspect the pressure sensor hoses and pipes for splits, melted sections, blockage or a loose end, and check that the upstream and downstream hoses are on the right ports. A hose that no longer sees the pressure ahead of the filter makes the filter look cracked or empty while it is fine.
Check the exhaust for leaks between the engine and the filter, which also lower the pressure the sensor sees.
With manufacturer-level software, read the pressure across the filter at several engine speeds and loads and compare it with the specification for that engine. With the hoses and sensor proven good, a reading well below specification points to a cracked, melted or missing filter; one well above it points to a loaded filter instead.
Look for soot where there should be none: a filter that works leaves the tailpipe and the pipe after it largely clean. A workshop can hold a clean cloth over the tailpipe while the engine is revved to see whether soot is getting through; this test is not meaningful straight after a regeneration, when an empty filter traps less.
On makes that use P2002 for a loaded filter, such as VW group diesels, a forced regeneration with manufacturer-level software is a legitimate next step once the sensor and hoses are proven good. If it does not bring the pressure back into range, the filter needs cleaning off the car or replacing.
A cracked or melted filter has to be replaced; cleaning removes soot and ash but cannot repair the substrate. Before fitting a new one, find what overheated or overloaded the old one (leaking injectors, a faulty exhaust fuel injector, repeatedly interrupted regenerations) and confirm the engine oil meets the low-ash specification, then have any adaptation the engine computer requires done with manufacturer-level software.

How much does P2002 cost to fix?

Repair	Parts Cost	Labor Cost	Total Estimate	DIY Difficulty
DPF differential pressure sensor replacement	€30–€120	€40–€120	€70–€240	Moderate
Clean, refit or replace blocked or split pressure sensing hoses	€0–€20	€40–€120	€40–€140	Moderate
Repair exhaust leak before the DPF	€30–€150	€60–€200	€90–€350	Professional
Forced DPF regeneration, where the code reflects a loaded filter (diagnostic tool)	€0–€0	€60–€150	€60–€150	Professional
DPF professional cleaning, where the code reflects a loaded filter (chemical or thermal)	€30–€80	€150–€400	€180–€480	Professional
DPF replacement (aftermarket, type-approved)	€550–€1100	€150–€400	€700–€1500	Professional
DPF replacement (new OEM)	€800–€3000	€200–€600	€1000–€3600	Professional

Prices estimated as of October 2026. Costs vary by region, vehicle, and shop.

Full repair guides

Diesel Particulate Filter (DPF) Replacement Cost

Engines known for this code

1.5 dCi

P2002 in the Skanyx app: what real cars show

Counts from fault-code scans in the Skanyx app in the 12 months to October 2026: 24 of the 806 cars that stored at least one code had P2002 stored.

Most often on: Volkswagen (6)

One car counts once, however often it was scanned. Figures below 15 cars are not shown. This is the fleet of one app's users, mostly in Europe, not a survey of the whole market.

P2002 on specific vehicles

P2002 on Volkswagen

Volkswagen Golf TDI

See Volkswagen-specific causes & cost

P2002 on Peugeot

Peugeot 308 HDi

See Peugeot-specific causes & cost

P2002 on Skoda

Skoda Octavia TDI

See Skoda-specific causes & cost

Common questions about P2002

What does P2002 mean on a diesel car?: P2002 means the engine computer thinks the diesel particulate filter is not trapping soot as well as it should. It usually works this out from a soot sensor after the filter or from a pressure difference across the filter that is lower than expected, so the cause can be a cracked or melted filter, a filter that has been removed, or a pressure sensor or hose giving a falsely low reading. On most makes it does not mean the filter is blocked: blockage has its own codes, such as P2463 and P244B. VW group cars are the main exception, where P2002 can also be set by a loaded filter.
Can I drive with P2002?: Only gently and only as far as a workshop. If the filter is cracked, the car is emitting soot it is meant to trap, which can push the smoke opacity measured at a periodic inspection over the limit, and whatever overheated the filter can damage its replacement too. On makes that also use this code for a loaded filter, backpressure can build and push the engine into reduced power. Book it in within days, not weeks.
Will a DPF clean or a motorway drive fix P2002?: Not if the filter is cracked or melted: a clean removes soot and ash but cannot repair the filter, and a motorway run only helps a filter that is loaded with soot. On cars that use P2002 for a loaded filter, a forced regeneration or an off-car clean can clear it. If the cause is a split or disconnected sensor hose or a faulty pressure sensor, the repair is cheap and the filter can stay. That is why the hoses and the sensor are checked before anyone quotes for a new filter.
How much does it cost to fix P2002?: It depends on the cause. A pressure sensor costs 70 to 240 EUR fitted, cleaning out or replacing the sensor hoses 40 to 140 EUR, and an exhaust leak repair 90 to 350 EUR. Where the code reflects a loaded filter, a forced regeneration is 60 to 150 EUR and a professional clean 180 to 480 EUR. A cracked filter has to be replaced: about 700 to 1,500 EUR fitted for an aftermarket type-approved filter and 1,000 to 3,600 EUR for a new OEM one.
Can a cheap OBD2 reader fix P2002?: It can read and clear the code and show the freeze frame, which is useful for seeing when the fault set. On most cars it cannot show the pressure across the filter, the soot load or the regeneration history, and it cannot run a forced regeneration or adapt a new part; those need manufacturer-level software. Clearing the code without fixing the cause only brings it back.
Is it legal to remove the DPF in Europe?: No. Removing the filter invalidates the emissions type approval the car was registered under, so it is prohibited across the EU. A car found without its DPF is exactly what an inspector has grounds to reject, and fines can be significant, though the checks and the penalties are set by each country rather than centrally. The vehicle may also be refused insurance cover.

Read our detailed guides

Sources

wiki.ross-tech.com wiki.ross-tech.com/wiki/index.php/18434/P2002/008194
carworkshopblog.blogspot.com carworkshopblog.blogspot.com/2016/05/technical-features-and-verification-of.html

Before you pay up to €3600, check P2002 on your own car