Ask Honest John

Most recently answered engine management questions
I tend to swap my cars every 12 months, over the last 5 years i have cars that are about 3 yrs old and with low mileage, each car has had the engine management light come on and work has been needed. I...
Is it true I have to keep going on long journeys to clear this sign?
Is my Polo GTI clever enough to recognise that most of my driving is around town and remap its engine management accordingly? If so, how can I get out of this mode when I want to return to using maximum...
The engine warning light is on in my Mercedes-Benz A-Class. What should I do?
I have a 2009 Ford Mondeo TDCi X Sport that's done 95,000 miles. I was driving at appox 40mph when I suddenly lost my power steering. The engine management light came on and there was a rasping noise from...
I have 2012 Ford Transit Connect, bought 1 November 2016. Since taking the speed limiter off the van, the fuel filter overloaded sign keeps coming up. Now the engine management light has come on with engine...
I own a 2004 Skoda Fabia 1.4 and I drive about 3000 miles per year. For the last three years the engine management light has stayed on, fault showing as EGR valve. This has happened three times and been...
My 2008 Honda Accord 2.2 i-DTEC hesitates and surges when I drive 30 - 40mph, eventually resulting in the engine management light coming on. The Honda garage diagnosed low fuel pressure and changed the...
I got a Nissan Qashqai 1.2 petrol from a main dealer at 9 months and 6000 miles and have run 3000 since then. Do you know anything about the recalled engine computer system update? On the first service...
I have a BMW 116 2006 model where everything seems to be fine until petrol is low the symptoms start to show. First the engine management light will come on and than there will be a loss of power on acceleration....