Ask Honest John

Most recently answered maintenance questions
I want to disconnect the battery of my Vauxhall Tigra to carry out some work but I do not have the code for the factory fitted radio. How do I reset the radio code once battery is reconnected?
We have a Volkswagen Transporter T6. Had a few problems with a fuse blowing and now the central locking is not working. Could this be a fuse problem?
Do you know where I can get an air filter for my 1986 Ford Sierra Cosworth? Ford don't list this item and I've tried Euro Car Parts, Car Parts 4 Less, etc.
The bonnet of my Rover 75 is stuck, what should I do?
You have wisely advised owners of diesel turbo cars to idle the engines after a fast run before switching the engine off. Is the same advise also applicable to petrol TSI cars, such as the Volkswagen Polo...
I have a 2003 Nissan Almera which keeps overheating. The water pump, thermostat and radiator cap are new. Could you help me?
I have a Peugeot Partner 1.6 diesel. The cooling fan is not working at all. I've checked all the fuses but they're fine. What should I do?
I have a Nissan Micra and my start/stop is not working. There are no faults on the dash board. I replaced the battery but it still does not work. The charge is fine on the battery. Any idea what might...
I have a 2010 Audi A4 diesel auto. When idle, the rpm jumps erratically. It doesn't do this while driving normally though. What could be causing this?
I have a Vauxhall Zafira 2001 1.6 petrol which has not been driven in months. It drives but won't go over 3000 rpm. It will when parked but there's white smoke. I did the pedal and brake trick and the...