Ask Honest John

Most recently answered emissions questions
Can I remove the gasoline particulate filter on my Skoda 2.0 TSI SE L 2019 petrol as it's causing terrible MPG on short trips round town as it keeps doing regens. It's great on long trips and does 45+mpg.
I have an emissions fail of 5.41m-1 average. Should I consider that a bad fail? Or hopefully should an air filter check/change, putting in additive and a high rev drive cure that kind of figure?
Do any cars from the last 5 years already meet the Euro 7 standard? I know new vehicles that come to market after July have to meet that standard, but I presume that some already will, but would like...
I am looking to buy an older small petrol vehicle that is in Euro Emission Category 4, currently CAZ compliant. Is there any chance they may change the limits and make the older cars in Emission zone 4...
I have a Ford Fiesta 1.0-litre EcoBoost, registered 2020. It is exactly the same model as the one I had from new in 2013, road tax free. Why am I now paying £190. Surely the new ones emissions will be...
I have a Jaguar XJ that I want to convert. Can it be done? How much will it cost?
I have looked at two identical cars of a similar age but when you go on the DVLA vehicle check site they have different emissions. One is registered May 2019 has CO2 113g/km and euro status EURO 6 W. The...
I’m about to by a Suzuki JIMNY SZ4 auto 2011 model It’s euro 4 compliant I live in Watford going into both ULEZ ‘s How long will Euro 4 be compliant for?
The emissions on the Ford Fiesta 1.25 Zetec were 120g/km, which put it in band C, Euro 5 and £35 tax. Then in Jan 2015 the emissions suddenly went to 122g/km and went into band D, Euro 6 and £150 tax....
Am I able to monitor the ADBlue my car has in reserve within its vehicle tank and if so how do i do this