⚠️ DPF Differential Pressure Sensor and thermostat issues causing repeated DPF issues on this one.
Here we have a Ford Mondeo 2.0 TDCi (2010 – 130,375 miles) booked in for diagnostic investigation and potential Engine Carbon Clean.
ℹ️ The owner had booked us in to investigate and clean up the engine (and DPF if necessary). The engine management light was on. The vehicle had been seen at a garage who had performed a ‘DPF Clean’ on it and replaced glow plugs.
Initial inspection found no major issues in the engine bay, but a large amount of background vibration and a significant bass note from the carbon present and the backpressure on the DPF.
Initial diagnostics showed the P2002 code for DPF Efficiency below threshold. This in itself does not indicate a blockage, but does indicate that it is not able to do it as well or as often as it wants to.
Live data monitoring showed more of the story. Coolant temperature would not rise above 80°C and when tested dropped to 75°C. This combined with short journeys and occasional low fuel levels would be enough to cause the problems, but the differential pressure sensor was also flatlined. The DPF stats showed:
– 875km average distance between regeneration
– 683km since last successful regeneration
– 128km since last attempt (unsuccessful)
To clean up the source of the dirt the owner asked to proceed with the Engine Carbon Clean and the engine soon smoothed out and quietened down and by the end it was much quieter, smooth and responsive again.
❗ The owner can now get the thermostat and differential pressure sensor dealt with. No need for a DPF clean as the DPF is not yet blocked again.
☑️ Full live data Diagnostics
☑️ Which? Trusted Traders approved Engine Carbon Clean
☑️ Safety first, fully insured and IMI Certified
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