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  Do you have to reset the ECU after cleaning the Mass Air Flow sensor? 18 Dec 2018 (Ask HJ)
  Do you have to reset the ECU after cleaning the Mass Air Flow sensor?
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  How do you start a car with a dead battery? 19 Mar 2018 (Ask HJ)
  My mate's Rover 75 won't start. It keeps making a clicking sound when he turns the key and his battery has gone completely flat. It wont start and you...
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  Water damaged BMW - should the dealer pay for repairs? 6 Jun 2014 (Ask HJ)
  BMW took my car in three months ago after my ECU failed due to water damage, I paid £1500 to have it replaced and repaired. Ten days ago it failed again...
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  Jaguar XF - can I remove the DPF? 16 Nov 2014 (Ask HJ)
  I keep getting a DPF warning light on my 2008 Jaguar XF. Can I have it removed and have the ECU remapped? I've found lots of websites offing this service....
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  Is the ECU unit on the B-Class a common problem? 29 Sep 2014 (Ask HJ)
  Is the ECU unit on the Mercedes-Benz B-Class a common problem with CVT gearboxes?
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  Does this Citroen Picasso have a Bosch or Siemens injector system? 24 Aug 2010 (Ask HJ)
  How do I check if a Citroen Picasso I may purchase has the better Bosch ECU injector system or the Siemens one?
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  Electrical faults with Mercedes C-Class 21 Jul 2013 (Ask HJ)
  The windows on my Mercedes-Benz C-Class have ceased to open or close with the key fob. The driver’s side heated mirror also switch on every time I start...
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  Porkies 15 Jan 2010 (Ask HJ)
  I purchased a “low mileage” Porsche from a reputed independent specialist 6 months ago, now showing 35,000 miles. While being serviced a problem was detected...
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  Could I have prevented my Octavia's turbo failure? 13 Dec 2016 (Ask HJ)
  I'm a taxi driver and I've got a 2010 Skoda Octavia 1.6 TDI. Whenever the DPF regenerates it blows a lot of smoke from the exhaust pipe. I eventually realised...
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  Should Audi cover the cost of my A4's faulty ECU? 30 Nov 2013 (Ask HJ)
  One injector of my Audi A4 2.0TDI failed. Audi replaced all four injectors free of charge. However, after they were replaced, the car would not start and...
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  Did the dealer damage my ECU? 10 Feb 2011 (Ask HJ)
  I had my Audi A6 serviced at a main dealership. At the same time they did a gearbox oil change for me. They returned the car to me and said all the work...
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  Is it worth getting an ECU remap on my Mazda? 31 Aug 2023 (Ask HJ)
  Is it worth remapping my 2020 Mazda 6 Skyactive 165ps?
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  Do I need to reset the ECU after having a new DPF fitted? 13 Aug 2017 (Ask HJ)
  The DPF on my 2010 Ford Mondeo TDCi burnt out, glowed red, smoked and then the exhaust dropped after 109,000 miles. No warning lights came up on dash....
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  Can a Ford Transit ASM ECU be updated or does it need to be replaced 23 Jun 2016 (Ask HJ)
  I have a Ford Transit LWB 2.4 ASM, when attemting to drive the vehicle, the Gearbox jumps out of forward or reverse into neutral, after a few seconds,...
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  Vauxhall Corsa will not start 17 Sep 2015 (Ask HJ)
  I have an automatic Corsa 07-plate and it will not start. The AA looked at it and tried to reset it but nothing showing on the diagnostics, so they took...
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  Do ECU tunes work? 18 Sep 2012 (Ask HJ)
  Regarding ECU tune-ups. Do they increase the power/ torque/ mpg as stated? Are they worth the investment?
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  Peugeot 406 starting problems 26 Jul 2011 (Ask HJ)
  I have a Peugeot 406 diesel 1999. It cut out on the motorway, after having about a week of starting problems. Diesel is getting to the injectors, and...
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  Persistent ECU fault on my Corsa 8 Jun 2013 (Ask HJ)
  I have a Vauxhall Corsa 1.4 Diesel 09 reg. I bought it from Evans Halshaw and it came with a three month warranty which has now expired. The problem I...
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  My Vauxhall Vectra automatic is creeping forward at tickover - what's wrong with it? 29 Aug 2010 (Ask HJ)
  I've just bought a 2002 Vauxhall Vectra 1800 auto. The ECU light has just started to come on when driving and this has only happened after the last service....
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  Will my insurance company increase my premium if I have my BMW 3 Series remapped? 19 Jul 2010 (Ask HJ)
  I have a BMW E46 and I'm planning to get my ECU remapped. Do I need to inform my car insurance provider? If I do, will they increase my premium? What if...