diesel engines | Ask Honest John

Ask Honest John

Most recently answered diesel engines questions

Are all cars with turbos problematic? I keep reading about turbo failures which puts me off buying a new car with a turbo. Do you have to treat these turbo cars in special ways, particularly after a long...

My Volkswagen has improved since the emissions fix - is this unusual?

We have a Volkswagen Golf 1.6 TDI which has had the software fix applied. Over the last month or so we've had a number of trips to London covering A and B roads using premium fuel and within the speed...

Emissions fix was applied by Volkswagen against my wishes - what are my rights?

My wife has a 2012 Volkswagen Golf TDI 1.6. She specifically asked the Volkswagen garage not to apply the EA189 emissions fix when the car had its service and MoT. However, it appears that they have applied...

Will Volkswagen replace the injectors on my Volkswagen Caddy after the emissions fix?

I've only had my 2010 Volkswagen Caddy Maxi for a month and the fuel injector has gone. The van has only done 77,000 miles. I read somewhere that Volkswagen were replacing for free due to a recall. As...

When will the petrol Ingenium engine be launched in the Land Rover Discovery Sport?

Any idea when the petrol Ingenium engine (252PS already in Jaguar F-Pace) will be launched for Land Rover Discovery Sport?

Has the emissions fix ruined the DSG in my Volkswagen Touran?

I took my Volkswagen Touran along for the emissions fix last Tuesday. The very next day, the car lost power at 40mph. The same thing occurred the next day and the next. On Saturday I stopped at a roundabout,...

My car went into limp mode with no warning - why has the DPF filled up so fast?

The DPF on my 2009 Jaguar XF was professionally cleaned after going from amber to red. The car had done high mileage (104,000), so I was kind of expecting it. 13,000 miles after the clean, it went straight...

Is there a defeat device in my Porsche Macan as with the Volkswagen EA189 engine?

I have a 2014 Porsche Macan 3.0-litre diesel, bought new. It recorded 42mpg or better on a long run and 39mpg average on short urban runs. Porsche wrote asking for the car to have a software update for...

Is it a dealer's duty to carry out a mileage check?

I bought a Mitsubishi L200 Barbarian in March 2016. At the time the mileage showed just over 31,000, the car came with full Mitsubishi service history that backs up the mileage throughout. I have now decided...

Why is my Renault Trafic emitting white smoke and going into limp mode?

My Renault Trafic 1.9 DCi glow plug light comes on and goes into limp mode. It also wont rev over 2000 and emits lots of white smoke from the exhaust. Can anyone help?