⚠️ Vehicle not as quiet, smooth, responsive or economical as it used to be? Engine light on or been on recently?
🚗 Here we have a BMW 120d (2009 – 107,857 miles) booked in for diagnostic consultation and potential Engine Carbon Clean or DPF Clean based on the findings.
ℹ️ The owner had used us previously on another vehicle and when the engine light started to appear on this one called us in to take a look after being advised it could be a DPF issue.
🔎 Initial inspection found little of note in the engine bay with no obvious rattles or leaks, but a slight surging at idle and lack of response underfoot. No significant boom from a blocked DPF either. There was a tell tale bass note present given the age and mileage from regular carbon buildup.
💻 Initial diagnostics found the likely culprit for the recent engine light with multiple codes for the EGR valve. We documented the code history, emailed that to the owner.
📊 Live data monitoring showed good values across most of the components with coolant temperature maintained around 90°C and DPF backpressure low and having recently regenerated so was no need for a DPF Clean (unblock). EGR valve looked erratic on the live data further confirming an EGR issue.
👨🔧 After a discussion with the owner he requested we proceed with the Engine Carbon Clean and the bass note from the engine soon subsided as the engine smoothed out and by the end was quiet, smooth and a crisp response again with a lovely burble back. The owner can now get the EGR replaced and hopefully this will then be back to normal running again.
☑️ Full live data Diagnostics
☑️ Which? Trusted Traders approved Engine Carbon Clean
☑️ Safety first, fully insured and IMI Certified
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