Ask Honest John

Most recently answered diagnostics questions
It was very timely to read in the Telegraph on Saturday about an Audi's failed ABS system. The light on my 2005 Focus keeps coming on intermittently. I haven't had it diagnosed yet but have just looked...
My son has had a 1998 Renault Megane from new, now 12 years old and 90,000 miles on clock. It keeps cutting out when driven. It starts again, but then cuts out again making it dangerous to drive. Renault...
I have a T-reg Volkswagen Golf. I would like to get my engine checked. Who can do this?
My Vauxhall Astra Life 1.8 16v 91H 2007 has a warning light showing a car and spanner. I have just had an oil change, so it can't be that. Any ideas?
I've been told the diagnostic point on my 1999 Volkswagen Golf is located beneath the heater controls but I cannot see it. Can you help?
I have an Audi S4 (the 2004 B6 version). The cause of the engine warning light coming on has been diagnosed by my local Audi dealership as a failure of the coolant sensor. They have asked for £310 to effect...
The engine warning light on my sons' 2002 Ford Focus 1.6 LX Estate illuminated about four months ago. He had it checked by a main dealer and was told the code indicated the Catalytic Convertor was defective....
This afternoon my X-reg 1.4-litre Mazda 323 died. The engine starts but will not run, it's as if the ignition is being switched off. I'm guessing there is a very special piece of technology that keeps...
I have recently bought a Volvo V40 on a 52 plate. It's a 1.9d, an excellent car and I am very happy. However earlier today I was sat at some lights. When I went to pull away the vehicle cut out. I attempted...
I have an Audi A4 TDI. When I put the boot down in second or third gear between 1000 and 2000 revs, the engine splutters as the turbo is working. It's like a dirty fuel filter but I know it's not, as it...