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• Vauxhall Corsa C (2000 - 2006) - 03 1.0 electrics and speedo problem 11 Jun 2014 (Forum)
  I the last few days I noticed the the engine idle also suffers a slight fluctation in tandem with the speedo (Which is weird yeah???). Could this be an ECU issue???? The car can also sit stationary with the speedo reading 50mph! And its clocking miles at the same time!! Anyone got any matches????
• Renault Clio II - Clio 1.2 16v expression toxic fume warning light 18 Nov 2012 (Forum)
   So, wallet in hand, I took it to the independent garage just around the corner and as soon as I explained the problem I was told it was running on 3 cylinders and needed the coil pack replaced.  Even at £150 this was a relief, but unfortunately didn't solve the problem.  The ECU was then sent away for investigation as (to quote the garage report) 'losing number 1 injector signal' but came back without any faults and only need a 'couple of dry solder joints'.     By this point the car was no better than if I had continued to drive it and the garage told me that they were confident that to fix the problem it would need a valve change - which would cost me in the region of £500!
• Mazda 6 TS TD 143 - Major problems with my used car, my rights? 14 May 2012 (Forum)
   When it was finally done it wouldn't run on its own and after another few weeks of diagnostics it was taken to the nearest Mazda dealership who got it running by reprogramming the ECU. The car was finally running again two weeks ago. However, it had a fault code and was stuck in limitted 'limp home' mode. The fault was the cam sensor, and the independent mechanic fitted new wires and a new sensor but to no avail.
• Mazda Mazda 6 (2002 - 2007) - 07 2.0 Loss of power, DPF flashes,TCS on, MAF sens 17 Jan 2012 (Forum)
  After several startups later that day these warning lights are on all the time. It's back with the dealership again and they're thinking the ECU is faulty - I'm not so sure but I don't know what else it could be and neither do they! Furthermore, they tell me that they've contacted Mazda and they can't offer any insight into the problem. Does anyone have any idea of what's going on here.
• Landrover discovery offroader. - Insurance write off category question 8 Jun 2011 (Forum)
  The vehicle is fully roadworthy with the exception of the wiper motor which is lethargic and requires replacing but the insurance assessor is insisting that the vehicle is a cat b write off and can't be put back on the road. It is a mechanically simple vehicle with no Ecu or airbags to worry about and as an offroader has been built to cope with mud and water etc. The settlement offered is in no way sufficient to purchase a replacement vehicle of the same spec so I'm really keen to keep this vehicle on the road.
• Ford Fiesta (1995 - 1999) - 96 1.3 efi endura e ohv stalling and acceleration 9 Feb 2010 (Forum)
  i dont want to keep spending money on it until i know exactly what the problem is, but i think this is going to be very difficult if nothing is showing up on diognostics. one person said it maybe the ecu, someone else said the wiring and the first man at the garage who checked the throttle said the valve has made a pit in the throttle body over time, so not enough air is getting through, hence the adjustment, but im still getting the problem, he said something about drilling, which i see you mentioned but i dont know which is the best course of action. would drilling fix it?
• Vauxhall Astra G Petrol (1998 - 2004) - 1999 1.6 8V Engine idle problems 18 Sep 2008 (Forum)
  The fans don't always come on when temp reaches 92 but it sometimes jumps down to around 85 (without fans coming and me reving the engine slightly). Could the ECU be at fault? I really need to get my car back on the road again, i've been unable to work the last 2 weeks and keep spending more money which i don't have! Any help and suggestions would be greatly appreciated!
• Saab 9-5 + Hirsch conversion 20 Apr 2007 (Forum)
  Saab has recently been trumpeting Hirsch performance upgrades (i.e. ECU remaps) for new 9-5s, but it turns out that anything you can do to a new 9-5 can also be done to an old one, with full Saab and dealer support. This has set me thinking; key points go something like this: * I really like Saabs - the 9-5 estate in particular - and Saab dealers, and would be very happy to renew my association with them
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  auto gearbox choice 23 Jun 2016 (Ask HJ)
  I briefly owned a 2009 VW Passat Estate – the 2.0L (138 bhp? TDi Highline version), with the DSG gearbox. Pulling out of a side road or entering a traffic...
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  You’ve been misinformed 21 Feb 2009 (Ask HJ)
  Motorists shouldn't get too enamoured with the recent government pronouncement of “Intelligent Speed Adaptation” GPS speed control for cars. Sponsored...
• MINI Cooper D - Mini CooperD DPF fault light - needing urgent help 2 Jun 2017 (Forum)
  If I get a diagnostics test done will it just reflect what the display is showing or will it know 100% if the DPF is knackered?  I've also been told by my local mechanic that once the DPF fault is up that the ECU will NOT perform a regen until the code is cleared, is this true?  The car seems to perform ok, although av mpg is only 45 for combined usage so a little low. Bought this only 1 week ago from a garage 150miles away (Eastfield Motors in Peterborough funnily enlugh), with a third party warranty that does not cover the DPF, but they have said if I return to them they will ''sort it out'', presumably free of charge.
• VW Crafter CR35 2.5TDI - DPF!!! As usual. 20 Nov 2016 (Forum)
  Ok, instead of the normal service intervals of 17,500 miles as advertised and which is why we purchased the van, they have reduced it to have a service every 5,500 miles (which we do in about 3-4 months) and they mention the DPF light coming on is not a fault....i agree, its not - but we have this light come on every approx 4-7 days with the oil levels rising and a huge loss in MPG including when we regen the light does not turn off.. They are apparantly backing this up with the ECU readings, the computer is telling them that we are failing to comply with the correct regen procedure...if there was no problem then why the hell would VW assistance agree to get the van recovered every time & every time its in VW carry out a free oil and filter change.
• Vauxhall Corsa C 2001 Comfort 1.0 12v - Corsa C Starting Problem IMMOBILISER? 4 Oct 2015 (Forum)
    My theory is this: The remote is sending dodgy/incomplete signals SOME of the time to the cars ECU. The car starts, but the immobiliser (which can disable one of three things apparently) is disabling the fuel injectors causing the car to stall out shortly after it starts. I can move the car around car parks etc, having to restart it each time it dies, so I can't imagine anything majorly mechanical has 'failed', it rather seems to me that the immobiliser is deliberately causing a problem which the engine is unaware of, meaning it tries to work, but is prevented from doing so shortly.
• Ford Focus 2006 1.8 TDCi Ghia - Using Coolant and Engine System Fault Message 31 Mar 2015 (Forum)
    They evenutually took it to a Ford Main Dealer who also could not diagnose the problem.  They replaced the ECU and said if that did not resolve the problem, a new Instrument Panel would be required.   Strangely, the light continues to come on, mostly at traffic lights and goes off as soon as you slow down again and press the brake and clutch!
• Renault Scenic - Loss of power 30 Aug 2014 (Forum)
  Finally, a replacement ECU unit has been fitted – but this also has made no difference.   My ex-Renault mechanic and all his contacts have run out of ideas.
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  Is it legal to have the DPF removed from your car? 25 May 2013 (Ask HJ)
  A quick Google search shows lot of companies are offering DPF removal. I can see this as an option that would be considered by many with DPF issues. As...
• E30 318i / 1994 / Tourer. - Fluctuating engine,lights & fan after new HT Leads 19 Feb 2013 (Forum)
   I thought the service light was to indicate that my car had not been in for a service, lol, which is true, as I have done the things myself, that a service would do, and all just for a bit of paper. Anyway, the ECU, I'm told would not know this, and its' to indicate that something is wrong somewhere. Pointing to the O2 Sensor probably, this seems to me, to make a little sense. I should replace these as  I have owned this car for 3 years and the previous owner for three years, and neither of us have replaced the fuel filter, lambda sensor or the creank sensors.
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  Which car i will keep, Nissian Almera 2.2 or Vauxhall astra 1.6 17 May 2011 (Ask HJ)
  I have Nissan Almera 2.2D sport (52 reg 84,000 miles). But it failed its MOT and I had to spend £900 to fix it. It took 3 months to fix. I bought it...
• Skoda Octavia TDi 110 - Water Pump. Intended to help others...... 1 Jan 2011 (Forum)
  Well it just goes to show what a difference changing the cambelt can make to the base pump timing, and that's why the fault codes were generated. The traction control cannot work properly if the fuel injection pump is mistimed, and the ECU cannot accurately control the timing if the base setting is outside the limit. I found out today that a regular check of the base timing can be very worthwhile, and worth checking if any other fault codes are present.
• Peugeot 307 (2001 - 2007) - 02 1.6 Cutting Out at Speed 7 Dec 2010 (Forum)
  I was having a new radio re-programmed on the car yesterday and the very helpful man did another diagnostic check and said that nothing at all came up - it hasn't happened for about 3 weeks (as I haven't been over 80mph) so I'm not sure how long the ECU remembers things for?! This guy reckons I should get the ignition coil and spark plugs changed. It sounds reasonable to me (at least cost-wise anyway!) but I just thought I'd see if anyone out there could shed any light on it for me before I go throwing money away!