The ECU has detected that the diesel particulate filter is not removing soot efficiently – a sign of a damaged DPF, a faulty pressure sensor, or an underlying engine issue causing excessive soot production. We rank the causes cheapest-first so you can avoid a costly replacement.
P2002 means the DPF is failing to meet efficiency standards – it's not trapping soot as it should. On Land Rover diesels – especially 204DTD Ingenium and 306DT V6 – this can be caused by a faulty pressure sensor, an exhaust leak, or a physically damaged DPF. It may also signal a deeper engine issue like injector problems.
Do not replace the DPF before ruling out sensor and exhaust issues. Follow the cheapest-first diagnostic order below.
The diesel particulate filter (DPF) is designed to trap soot particles from the exhaust. The ECU monitors its efficiency using differential pressure sensors (before and after the DPF) and calculates how much soot is being trapped. P2002 is set when the ECU determines that the DPF is not trapping enough soot – meaning its efficiency has dropped below a threshold, typically around 60-70%. This can happen because the DPF is physically damaged (cracked or melted), there is an exhaust leak affecting pressure readings, the pressure sensor is faulty, or the engine is producing excessive soot due to injector or combustion issues. On Land Rover engines, the 204DTD and 306DT are both prone to DPF-related codes, and P2002 is often the first sign that something is wrong with the DPF or its monitoring system.
Ordered by how often each turns out to be the real culprit – with typical fitted cost against each, so you can sanity‑check any quote you've been given.
| Cause | Likelihood | Typical Cost (fitted) | Notes |
|---|---|---|---|
| Faulty DPF differential pressure sensor | Very High | £150–£350 | Most common – gives false low efficiency readings |
| Damaged or blocked sensor hoses | High | £50–£150 | Often the cheapest fix – a simple hose replacement |
| Exhaust leak before or after DPF | Medium | £200–£600 | Affects pressure readings and efficiency calculations |
| DPF physically damaged (cracked or melted) | Medium | £1,500–£2,500+ | Allows soot to pass through – requires replacement |
| Injector or fuel system issues causing excessive soot | Low | £500–£1,500 | See P0087 – address the root cause first |
Cost figures [PATTERN DATA] – indicative independent‑specialist pricing based on known failure patterns for Land Rover diesel engines.
Inspect the sensor hoses for blockages, kinks, or damage. A blocked hose is a common and cheap fix.
Compare the sensor readings to expected values. An implausible reading points to the sensor itself.
Check the entire exhaust system from turbo to tailpipe – leaks affect pressure differentials.
Look for cracks, damage, or signs of melting. This may require removing the DPF for a thorough check.
If the DPF is physically damaged, it cannot be repaired – replacement is the only option.
Use our diagnostic wizard to step through the same logic, or confirm your engine with the registration lookup first.
Only short distances, and with extreme caution. P2002 indicates the DPF is not working correctly – soot is passing through into the atmosphere, which is an MOT failure and may also indicate the DPF is damaged. If the DPF is cracked or melted, driving can allow hot exhaust gases to cause a fire risk or damage the turbocharger. If you notice black smoke or a strong smell of diesel, stop driving immediately. It's generally safe to drive gently to a specialist, but avoid heavy acceleration and long journeys until the cause is diagnosed.
Only short distances and with caution. If the DPF is damaged, driving can be dangerous – hot exhaust gases may escape and cause a fire risk. If you see black smoke or smell diesel, stop immediately. Drive gently to a specialist for diagnosis.
No – in many cases, a faulty pressure sensor or a blocked sensor hose is the cause. DPF replacement is the last resort. Follow the diagnostic order above to avoid an expensive misdiagnosis.
Only temporarily. The code will return if the efficiency issue persists. Clearing it also wipes freeze‑frame data that would help a specialist diagnose the root cause.
Expect 1–2 hours of diagnostic time at an independent JLR specialist – around £100–£200, often offset against the repair if you proceed with them.
For the 204DTD Ingenium, replacing the DPF pressure sensor or cleaning the sensor hoses is the most common and cheapest fix – it resolves the code in over 40% of cases [PATTERN DATA]. Always inspect the hoses first.
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