CASE 013
DPF Warning and Severe Power Loss
expert
26 min
Diesel
Vehicle
- ModelTraining MPV 2.0
- Engine2.0 CRDi
- Mileage189,000 km
Customer complaint
The DPF warning light is on and the vehicle is in limp mode with very little power.
History
Only short urban journeys for the last year. The glow plugs were replaced recently.
Fault codes
P2002 Particulate filter efficiency below thresholdP2463 Particulate filter soot accumulation
Live data
- Soot massVery high
- Differential pressure at idleClearly elevated
- Last successful regenerationA long time ago
Measurements
- Exhaust back pressureHigh
- Cylinder balanceOne cylinder contributing less
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Diagnostic case
Next step — Reasoning.
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Confirmed cause
A heavily loaded DPF with an underlying combustion fault contributing excess soot.
Reasoning
Elevated differential pressure with very high soot mass confirms a loaded filter. Because short journeys prevented regeneration, soot accumulated. The cylinder balance measurement suggests an underlying fault producing extra soot, which must be fixed or the DPF will block again.
Recommended repair
- Diagnose and repair the underlying combustion fault first.
- Perform the manufacturer-approved regeneration or cleaning procedure.
- Advise the customer on driving patterns and monitor soot mass afterwards.
All values shown are training examples. Real thresholds depend on the manufacturer, engine, temperature and system — always confirm with the vehicle service documentation.