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  Increasing oil levels with Yaris diesel 1 Feb 2015 (Ask HJ)
  My 2011 Toyota Yaris diesel is suffering from increasing oil levels. It seems that diesel is getting into the sump. The car is still under warranty and...
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  Can I take my warranty company to the small claims court? 11 Sep 2010 (Ask HJ)
  I have a claim on an extended warranty for a broken-down ECU, sensor and wiring harness which had to be replaced. The cause on the invoice was "Thermister...
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  How can I get my Peugeot 307 through its MoT? It's failed on emissions. 31 Aug 2010 (Ask HJ)
  My Peugeot 307 1.6 diesel has just failed the MoT on emissions. There are no warnings on the dash and my mechanic is unsure of where to start to fix the...
• Ford Fiesta - eac fail 7 Feb 2018 (Forum)
  has anyone had this eac fail prob with fiestas solved yet..........does having the ecu guarantee this fault with not occur again.thanks
• vw toureg - dpf removal 2 Feb 2012 (Forum)
  if i have the dpf  egr and vsl removed and the ecu remapped by an expert  will this solve the problem of the dpf getting clogged  on short journeys?
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  Engine doesn't start - should diagnostic check discover the fault? 13 Jan 2013 (Ask HJ)
  I run a Vauxhall Corsa diesel 1.3 Club, 58 plate, 43,000 miles on the clock, regularly serviced. It is a driving school car. Recently, in the middle...
• Audi RS5 - Where do I stand 21 Jun 2024 (Forum)
  post sale checks The Company received data suggesting your vehicle has travelled more miles than the current odometer reading. To validate this data we arranged for your vehicle’s Engine Control Unit (ECU) to be read. The results of the ECU reading identified that your vehicle’s mileage has been
• Leon idle problem - constant hunting when cold 26 Oct 2018 (Forum)
  on for about 15 minutes until the engine has warmed up, at which time the idling is fine around 900 rpm. Know someone with a diagnostic tool, and the ECU reports no problems. From looking around the forum I can see injectors or glow plugs may be the culprit (would have thought they would
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  Why do my car windows open all by themselves? 28 Jul 2018 (Ask HJ)
  I returned to my car to find all of the windows open. Is there a fault with the motors used to open/close the windows? The car is a SEAT Leon.
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  What caused all four windows in my locked 2013 Skoda Octavia to open overnight? 14 Feb 2017 (Ask HJ)
  I left the windows of my locked 2013 Skoda Octavia closed and in the morning all four windows were half open. What could cause this to happen?
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  How can I fix faulty locks on a Hyundai i10? 22 May 2015 (Ask HJ)
  My 2008 Hyundai i10 keeps unlocking and unlocking itself at night. The car's been to the garage and they have reconfigured the fob but still happens. Any...
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  Why has my Ford C-Max gone into limp home mode? 1 Apr 2015 (Ask HJ)
  I've recently replaced the clutch and DMF in my 2004 Ford C-Max 2.0 diesel. However, the car has now gone into limp home mode. Any idea why?
• 2004 Zafira 1.8 Sri - Water in the loom main plug 19 Feb 2014 (Forum)
  Spent over 500 on this car in the last 3 weeks roughly 1st problem was crankshaft sensor so got new one sorted, then then light was still comin on so then was told need new ecu, had that done and then the light still came on then told it was maf sensor and so changed that, thing is now I'm being
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  Leaky fuse box on Peugeot 207 19 Jan 2014 (Ask HJ)
  The ECU on my 2007 Peugeot 207 is throwing up warnings at random and switching lights and wipers on even when I'm not in the car. I’ve been told it could...
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  What are the advantages of K and N air filters? 22 Aug 2013 (Ask HJ)
  What are the advantages and disadvantages of a K and N Air filters on a 2005 Peugeot 307?
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  Central locking playing up 12 Jan 2013 (Ask HJ)
  I have a persistent problem my garage can't solve. They’re very good but this ones got them stumped can you help? When I turn on the ignition the central...
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  Loss of power 10 Jan 2013 (Ask HJ)
  It's a Vauxhall Vectra B 2.0DTI 16v. All was fine til the engine bay was washed. Now the engine management light comes on, Major loss of power, when cold...
• Peugeot 307 SW (2002 - 2008) - 03 2.0 HDi Refilling diesel additive tank 22 Feb 2011 (Forum)
  forums I realise that after filling the tank I'll need to get the additive dosing ECU and the main ECU reset. The problem is that the kit comes with no instructions and it's not obvious how to fill it. If anyone has managed to do this job I'd be grateful for any tips. Many thanks, Richard
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  Have I blown a fuse in my 2006 Ford Fiesta by connecting the battery in reverse? 28 Aug 2010 (Ask HJ)
  I have a 2006 Ford Fiesta. I tried to jumpstart it by connecting the battery the wrong way round. Now the car is completely dead. Do I need a new battery...
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  Do I need to have my Audi A3's pump module recoded after replacement? 10 Aug 2010 (Ask HJ)
  My Audi A3's ABS pump module has packed in. I got a used pump and module with the same numbers on as mine, but was wondering whether, if the part numbers...