A code that signals the diesel particulate filter (DPF) is not filtering exhaust gases efficiently. On Jaguar diesel engines, this often points to a damaged DPF, a faulty differential pressure sensor, or a failed regeneration. Ignoring it can lead to expensive DPF replacement and engine damage.
P2002 means the engine control unit (ECU) has detected that the diesel particulate filter (DPF) is not removing soot particles from the exhaust as efficiently as expected. On most Jaguar diesel engines - from the Ingenium AJ200D to the 3.0 TDV6 - this is typically caused by a cracked or melted DPF, a faulty differential pressure sensor, or a failed regeneration. The fix can range from a £150 sensor replacement to a £2,500+ DPF replacement.
Do not ignore P2002. A failing DPF can cause exhaust backpressure to damage the turbocharger and engine.
In a modern Jaguar diesel, the diesel particulate filter (DPF) is monitored by a differential pressure sensor that measures the pressure drop across the filter. The ECU uses this reading to calculate the soot load and the filter's efficiency. P2002 is triggered when the ECU detects that the DPF is not trapping soot particles effectively - meaning the filter's efficiency has dropped below a calibrated threshold. This can happen because the DPF is physically damaged (cracked or melted), the differential pressure sensor is faulty, or the filter has become so clogged that it cannot regenerate properly. The code is common on Ingenium diesel engines in the XE and XF, particularly on vehicles used predominantly for short urban trips. The underlying cause is almost always related to the DPF or its sensor, making it a code that demands systematic diagnosis.
If you see the DPF warning light, try a motorway run at steady speed. If the light persists, arrange a diagnostic check immediately.
Based on real diagnostic patterns from Jaguar specialists. The order reflects both likelihood and typical repair cost.
| Cause | Likelihood | Typical Cost (Fitted) | Notes |
|---|---|---|---|
| Faulty DPF differential pressure sensor | High | £150–£300 | Sensor misreads pressure, causing faulty efficiency calculations |
| DPF internal damage (cracked or melted) | Medium | £1,800–£2,800 | Often due to failed regeneration or physical impact |
| Incomplete regeneration cycles (repeated short journeys) | Medium | £150–£350 (forced regen) | DPF never reaches required temperature for effective cleaning |
| Faulty EGR valve | Medium | £200–£500 | EGR issues can affect combustion and soot production; see EGR valve failure |
| Injector issues | Low | £500–£1,500 | Poor combustion increases soot; common on high-mileage 204DTD units |
| Turbocharger oil seal failure | Low | £1,200–£2,500 | Oil ash can block the DPF; see turbocharger failure |
Cost figures [PATTERN DATA] - indicative independent‑specialist pricing, not drawn from our engine replacement dataset.
A competent Jaguar specialist will follow this order to avoid misdiagnosing an expensive DPF replacement.
Using diagnostic software, read the differential pressure and compare to expected values. A faulty sensor can be replaced cheaply.
Read the calculated soot load. If it's within limits but efficiency is low, suspect a sensor or physical damage.
If the soot load is high, a forced regeneration may clear the code. This costs about £150–£350.
A visual inspection with an endoscope can reveal cracks or melting. This is often required before deciding on replacement.
If the DPF is damaged, replacement is the only option. This is the most expensive repair.
Our diagnostic wizard walks the same order, or use the registration lookup to confirm your engine.
Conditionally, yes - but only to get it directly to a garage. P2002 is similar to P2463 but specifically indicates efficiency below threshold, which often means the DPF is not filtering properly. Driving with a damaged DPF can cause exhaust backpressure to build up, which can damage the turbocharger and lead to engine oil dilution. If the car has entered limp mode, it's unsafe for motorway driving due to lack of power. The safe approach is to avoid heavy acceleration and long journeys. If the DPF warning light is flashing or red, stop driving immediately and have the car recovered.
It means the ECU has detected that the DPF is not filtering exhaust gases efficiently, often due to a faulty pressure sensor or physical damage to the filter itself.
Conditionally, yes - but only to get it directly to a garage. Avoid heavy acceleration and long journeys, as a damaged DPF can cause exhaust backpressure that damages the turbocharger. If the warning light is red or flashing, stop driving immediately.
Yes, it can be serious. While it may be caused by a faulty sensor, it often indicates a damaged DPF that needs replacement. Immediate diagnosis is recommended.
The cost ranges from about £150 for a sensor replacement to £1,800–£2,800 for a full DPF replacement. Diagnostic time is typically 1–2 hours.
Only temporarily. The code will return as soon as the ECU recalculates the efficiency, which is usually within a drive cycle or two. Clearing it also destroys freeze‑frame data that helps diagnosis.
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