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• 
  Filter tips 26 Sep 2011 (Ask HJ)
  I'd never owned a diesel-engined car before I bought my pre-registered 2005/55 Volvo V70 in March 2006. It's a delight to drive: a real mile-eater, and...
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  Partic bristle 24 Jul 2010 (Ask HJ)
  Family members are the victim of the diesel particle filter fiasco. They have a '56 registered Vauxhall Zafira 1.9CDtI SRI150 with 40,000 miles on the...
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  Lexed car? 2 Jan 2010 (Ask HJ)
  My present car is a Lexus LS430, which is more than 3 years old and has completed 29,500 miles in a faultless manner. I am considering changing it for...
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  Merceladies Benz 5 Dec 2009 (Ask HJ)
  My wife has recently bought me a Mercedes E320CDI. It has a full service record and has done 71k miles. I know that you do not recommend diesel motors...
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  Stop starve technology 5 Dec 2009 (Ask HJ)
  I am really interested in the Vauxhall/Opel Ampera. The benefits seem inescapable. However, given a scenario where the car is used on the daily commute...
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  Serious blow 12 Sep 2009 (Ask HJ)
  We have a 53 plate 307 2.0HDI and recently every journey was enhanced by the ‘anti-pollution fault’ appearing - and an accompanying rev cut to 2,200rpm....
• 2014 Audi A1 1.6 TDI - EGR Fault and Limp Mode 3 Oct 2023 (Forum)
  and it says P0407 EGR sensor B circuit low. If the EGR is the issue, it'll be expensive as these are apparently a pain to do on these engines. Anything I can try myself? I've taken it for a good blast, it drives perfectly when the light isn't on; and it completed a DPF regeneration successfully. I just
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  Are there any tips for keeping our cars running when they're in storage under lockdown? 24 Mar 2020 (Ask HJ)
  We aren't using our cars regularly, following Gov restrictions. Are there any tips regarding tyres, batteries etc?
• Hyundai i30 petrol - Great car except for..... 15 Jun 2019 (Forum)
  in a diesel car for the Hyundai as I don't do the miles for a DPF to function effectively. But reading the manual for the Hyundai (petrol) I was surprised to see a reference to the possibility of a 'soot' warning light and advice to drive the car at 2k+ revs for at least 15 minutes!
• Nissan X-trail 1.6 T32 - Exhaust electric throttle control actuator 28 Aug 2018 (Forum)
  in exhaust it also helps to increase temperature within exhaust system to increase temperature within catalytic converter and DPF.  (4) Any fault/failure with the Exhaust electric throttle control actuator could have a detrimental effect on other parts of the exhaust/EGR systems. Can
• Renault Koleos - Check injection warning but car fine and no errors 7 Mar 2018 (Forum)
  of Redex DPF cleaner in.  Took car to garage and light went out on the way.  No error codes found once plugged in.  Car was fine for next two weeks. Filled up again at Asda with diesel.  Message comes on again.  Another bottle of Redex in but this time nothing. Message still
• Golf tdi 2009 1.6 - Injector problem 12 Jun 2017 (Forum)
  the emissions is recall without any issue. Error light was only engine management and not dpf Any ideas? I do not want to take a faulty car back which a hefty bill for something not running properly when I do a lot of miles and rely on it.
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  Best SUV for £12k? 27 Sep 2016 (Ask HJ)
  I'm thing of getting a used SUV. I have £12,000 to spend and was something that's comfortable, reliable and economical. I do 12,000 miles a year. What...
• 2006 KIA Sorento 2.5 diesel - Any problem in using a low SAPS oil in older car? 9 Apr 2016 (Forum)
  for £35 for 10l and £55 for 20L which seems to be a very good price. My question is, are there any issues to using low SAPS oil in an older vehicle which doesn’t have a DPF?  
• VW Sharan 2.0TDI SE Bluemotion 2011 (7N) - VW Sharan 2011 (new shape) poor fuel economy 9 Feb 2015 (Forum)
  : 50.4mpg). Tyres are Michelin Energy. It switches off at traffic lights and I follow gear change indicator recommendations. The DPF light is not on and it performs well. Anyone any thoughts on what might be causing this poor economy? To give an indication of my driving style, I have
• Ford Kuga - OBD port Issue 23 Jan 2015 (Forum)
  ,  I have an issue with the OBD port on my 2009 mk1 kuga. Prior to my Mot last November, the engine management light appeared on my dash. A friend in work has an obd Bluetooth reader and plugged it in. Turned out the fault code present was the dpf pressure was low, I'm assuming it was due to short
• Mazda 6 - MAZDA 6 Diesel or not? 17 Aug 2014 (Forum)
  . Option 1 - Mazda 6 (09/10 plate) -but heard many horror stories about how bad the diesel cars are and chain cam being a problem. Option 2- Audi A4 (07/08 plate) - DPF problems
• Ford C-Max - faulty engine response 5 Aug 2014 (Forum)
  I have an old ('04) Ford C-Max with a 2.0 diesel engine which I believe is pre DPF. The car has an engine problem which, though very intermittent, is potentially dangerous.  The last two times it happened were both at junctions, the engine idling as I waited to pull out into a larger
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  Buying a petrol SUV - what do you recommend? 14 Jan 2014 (Ask HJ)
  I want to buy a new SUV, but only cover short distances and the new DPF diesels aren’t suitable. What do you recommend?
• No fifth wheel for my wagon to go rolling along 15 Jul 2013 (Forum)
  Just changed my vehicle to a Nissan QQ (petrol - dpf frightened me off diesel) Lo and behold on checking for the spare what do I find?. No wheel, no space saver just a can of goo and a mini compressor to deal with a flat. While this MAY be suitable for the odd nail