Ask Honest John

Most recently answered regenerating questions
I want to trade in my 2011 diesel Nissan X-Trail 2.2 for a slightly smaller 4WD. I commute 50 miles a day, but need a 4WD for rough farm tracks. I have a budget of about £20,000 - £25,000 after trading...
My 2016 Toyota Yaris diesel fuel consumption meter indicates a large increase in consumption for about 25 minutes every 350-400 miles. Is this the DPF regenerating?
I had the emissions update on my SEAT Ibiza 1.6 TDI Sportrider. Eight weeks later, the turbo blew. SEAT tried to blame me by saying there was too much engine oil. I got an oil sample done and the oil was...
How do you know if your DPF is regenerating while driving?
I stumbled across a couple of issues which seem to do the rounds on various forums, so I thought I'd ask here for a definite answer. One is that the Start-Stop mechanism, as implemented in the Audi A6...
The emissions fix was done on my 2010 Volkswagen Golf 1.6 TDI in January 2017 and it now drives very differently. The DSG gearbox changes up into seventh gear much earlier than before (at around 40mph)...
I own a Volkswagen Golf Estate Mk6 1.6 TDI. I bought it a year ago as a family estate and I like the car a lot. Recently the EGR valve failed, luckily under main dealer warranty. At the same time as this...
I've recently purchased a 2011 Ford Galaxy 2.0 TDCi. After the local Ford dealer changed oil and all filters they advised me to (as the car was immobile for months) execute the following procedure after...
I bought a brand new diesel Volkswagen Golf in January. There was a series of minor problems at first; tyres at the wrong pressure, pulling left, a burning smell next to the front passenger wheel arch,...