Ask Honest John

Most recently answered nox emissions questions
The more I read the less convinced I am about the supposed environmental benefits of electric cars. Volvo has said that the energy used to create them is far in excess of that for a petrol or diesel...
My Skoda Octavia 1.9 TDI has failed its MoT due to excessively high smoke. It was registered on 3 July 2008 and the MoT tester says it has failed the new rules that were introduced on 20 May 2018. I’ve...
We’ve ordered a new Volkswagen Tiguan and we're getting rid of the old car under the scrappage scheme. The Tiguan was ordered in January, but since then, the Volkswagen scrappage scheme has finished. We...
What is meant by EU4, EU5 and EU6 when applied to diesel engines?
I'm planning to buy a 2012 Volkswagen Touran that hasn't had the emissions fix. Is it okay to buy the vehicle and not get the emissions fix? Will I be able to get on peacefully with it? It's done 52,000...
I had the emissions fix done on my 2012 Skoda Octavia 1.6 TDI on 10 October. My car went into limp mode and showed two warning lights yesterday. I drove to my local garage, where they told me injector...
My daughter recently bought an 2010 Audi A3 TDI. It cost £6500 and she had it for seven months when the EGR valve needed replacing. We took it back to the dealers and they charged her £750 to replace it....
I'm told that certain French cities now require cars to display a sticker stating their official emission values. Apparently lots of Brits are being fined by the French cops for failure to comply. Is this...
Our 2013 Volkswagen Tiguan 2.0 diesel had the emissions fix five weeks ago. Last week, it went into limp mode and the dashboard lit up like a Christmas tree. I took it back to Volkswagen. After they had...
I'm considering a current model Citroen C4 Picasso with EAT6 gearbox, but I'm worried about the future for diesels. Would I be wrong to think that AdBlue engines are likely to be treated much more leniently...
 

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