Ask Honest John

Most recently answered warning lights questions
With the new regulations for passing an MoT - I have an 04 Pug 406 and the airbag warning light has always been on (a known fault on 406s) - will this result in a fail?
The glow plug light is on all the time on my Ford Mondeo.
Is there an easy way to turn off the ABS light on my Rover 75. There is no resistance in the sensors - no voltage when the wheels are spinned, so probably the ABS-unit is defective and has blown them off....
I have a 2002 Ford Fiesta 1.4 Tdci - I was driving along and all of a sudden I had power loss and a warning light on the instrument cluster, reading E.A.C Fail. The car would not drive over 30mph, and...
Engine management light permanently on. Dealer says it needs a new catalytic converter as a result of damage due to misfire and faulty coil pack (since replaced). This is a twin cat model so replacement...
I have just purchased a Citroen C3 and have noticed that on the first start of the day the preheat light comes on and will not go out until I start the engine. I know that on other diesels the light goes...
Flashing DPF dasboard light came on at 23400 miles on 15/02/12. Mazda dealer diagnostic check showed that they had not reset the car computer(?) after the service in July 11, no actual fault with DPF....
I have a 03 Leon 1.4 petrol. Yesterday the engine warning light (Diagnosis/warning of excess pollution) came on. All the time, not flashing. There also seems to be a lack of power and the engine rumbles...
My Volvo S60 has a full service history, but about 500 miles ago the engine system service light kept coming on then going off, etc. The car drops power slightly for a few secs then drives ok but the...
In a recent reply you wrote that cars will now fail their MoT tests if certain warning lights, including airbag warning lights, indicate anything wrong. For the last three years I've been driving a 2003...
 

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