Ask Honest John

Most recently answered technical issues questions
For the last three years or so I have been running a Peugeot 407 and have been very pleased with it. It recently developed a fault with a dash display warning that ABS and ESP were disabled. As it was...
What is the technical reason for suggesting that turbos are allowed to idle for a couple of minutes before switch-off, and does this apply only after a motorway-type drive? What effect does it have on...
I have a 2006 Vectra 150SRI. It is garaged each night, but some mornings I open the garage to find the car's front windows are down. My dealer has suggested any fault must be human error, i.e. the electric...
A friend of mine has a Golf Plus, just over 3 years old. Original owner, full VW service history, 42k miles. A braking system warning light came on. He was going to go non-franchise until I told him about...
I recently purchased an 11,000 mile 2007/57 Mercedes CL63 AMG from a private seller. After taking it to the main dealer for a service and reporting a judder under braking, I was told that due to pitting...
As a taxi operator my vehicle does a high mileage and the Mondeo Mk 2 diesel that I have at present has done nearly 200,000 miles without serious fault. However it is now due for replacement and I am concerned...
I have two questions about my 2004 Volvo V70 D5 with 22,000 miles. For the last few years there has been a rattle when the clutch is dipped down. The rattle stops when it’s up. It rattles some days more...
I've been reading about inadvertent fuel contamination (putting petrol in your diesel tank or vice versa). The AA’s website link to "Fuel Assist" (their own mobile department for helping stranded motorists)...
I would appreciate advice on maintenance of new car bodywork/what product(s)would you recommend to build up a barrier on paintwork to help withstand chips/weather etc. How best to apply and how often? Lastly,...
I purchased a VW Touran, 1.4 TSI Sport model, in July 2007 from Motorpoint. It was second-hand and was first registered on 01/09/2006. In September 2007 the ESP warning light came on - "ESP Off" was showing...