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  SEAT Leon - windows opening by themselves 15 Dec 2013 (Ask HJ)
  The windows on my 2001 SEAT Leon are opening by themselves when I lock the car. What’s going on?
• Honda Accord 96 - Refit Repaired ABS Modulator - new problems 9 Oct 2013 (Forum)
  The VSA warning light has been on for years and I didn't bother with it as it didn't affect the MOT. It now does. Honda said 2k, so I got the part taken out (ABS modulator) and sent it to ECU testing who repaired it. My mechanic then put it back in but the light is still on so he checked the fault codes and there are four new ones coming up along with the two old one. ECU Testing advised him to clean sensors and reset but no luck.
• Mitusbishi & Others - Diesel Particle Filter removal 30 Sep 2012 (Forum)
  They changed the engine oil and filter after regening the DPF, apparently the oil was corrupted and had been running above the fill level. They also tweeked the engine ECU with an update. So I come to the crunchpoint: I am seriously consdering a DPF removal , I have been told by an expert that it is not part of the MOT, but smoke emisssion IS. The company I spoke to ,have been in Engine tuning for quite a while, and after DPF removal they would remove all ECU programming relevant and after the procedure would run an Emission test.
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  Octavia windows opening 9 Jan 2012 (Ask HJ)
  The windows on our Octavia open when the car is locked and left. This has happened several times and we have had a sat nav stolen as a result. Is this...
• 
  Electrical issues 8 Nov 2011 (Ask HJ)
  I needed a jump start on my car recently, and now the 2 rear doors wont open or lock with the key (only manually) and the 2 front electric windows wont...
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  Warning message of blocked fuel filter on Peugeot 307 HDI 15 Jan 2011 (Ask HJ)
  Warning message has come up saying blocked fuel filter. I've changed the filter already, yet still receiving message. Any ideas on how to cure it?
• Vauxhall Astra G Diesel (1998 - 2004) - 01 1.7 Knocking noise from engine 31 Jan 2010 (Forum)
  Hi my asta van has a general knocking noise coming from the top end of the engine, i have checked the valve timing and checked camshafts for wear and checked tappets for correct gap and all is fine, the van drives fine with no loss of power, i have tried to read fault memory but unable to read memory with diag machine, i have heard a few rumours about the 2 ecu's in the engine bay causing certain engine running and knocking noises, ie fuel knock/pinking, can anyone advise me what these ecu' issues are or are there any known problems like this that anyone can advise me on, any help would be great.
• Vauxhall Corsa B (1993 - 2000) - 99 1.2 Sudden loss of power - how do I test AFM? 12 Jun 2009 (Forum)
  I've checked the thottle cable and it seems to be fine so I am suspecting an AFM fault. There is no ECU fault codes but apparantly on the 1.2 16v faulty AFMs usualy do not show a fault unless its very bad. The other sting is that people have had ECU problems resulting in cheap after market AFMs so it is advised to use a Bosch one but they are £100.
• Peugeot 307 (2001 - 2007) - 03 2.0 "Unblock Diesel Filter" 4 May 2009 (Forum)
  Hi guys, I have a 03 reg 307 hdi 110 bhp (RHS) and have recenly had the ECU remapped to increase its performance (now 145bhp). the car has only done 46k, mostly urban driving, and has been regularly serviced (although not by peugeot). it has just given me the "Unblock Diesel Filter" warning and beep.
• Ford Mondeo III (2000 - 2007) - 2004 2.0 TDCi fuel Consumption 10 Apr 2009 (Forum)
  I am told it should be more and the local Ford garage has not been able to improve it. It regularly soots up the EGR valve and has had a replacement ECU with several attempts at ECU firmware upgrades. It also suffers the 1700rpm flatspot. Has anyone been able to improve the consumption and fix a similar problem? How did you manage to convince Ford that it could be fixed?
• Peugeot 307 (2001 - 2007) - 01 HDI lack of power etc. 6 Apr 2008 (Forum)
  hi i have a Peugeot 307 hdi 51 plate. i have been having problems with it no power and then eventually gave up on me in January. had it in at a peugeot garage and can only find a fault on the fuel pump. since then i have sent my ecu away and that has come back fine. hubby plugged ecu back in and now the car is running but it has all lights on dash board such as air bag fault,, anti pollution etc etc etc i do not dare take it anywhere just incase it conks again do i need to get the system set to remove these lights or do you have any idea of anything else thanks Year and engine details (bhp ?)
• Golf V5 mk4 vibration and juddering 12 Oct 2006 (Forum)
  I took it to a garage and it kicked up a number of faults - throttle body short to ground, mixture problems, and ecu defect. I was told to change the throttle body and that would cure it all. After changing the throttle body, the fault was not rectified so i took it to another garage to get the codes cleared, and now the ecu reads no codes however.. the car is still juddering and shaking a lot while stationary and also while taking off.
• Vectra lumpy acceleration 5 May 2005 (Forum)
  Fantastic, however, I still have a lumpy acceleration problem. Between 1000 and 3000 RPM the car is lumpy as hell. I tried the paper clip trick on the ECU and found no fault codes and the ECU light has never flashed on. THe car has had new plugs, fule filter etc within the last 10K and has only done 80K. HELP, its driving me mad. I though at first it could be the crank or camshaft sensor, but surely this would register a fault code??
• Fiat Punto Overfuelling 12 Feb 2003 (Forum)
  MAP sensor appears to be OK but not exactly sure how to test. Did wonder if fuel reg pressure is too high but I can't see how the ECU would know about this, hence how would it know to put fuel injection warning light on? I'm beginning to suspect the ECU but that's a bit drastic! Any help would be very welcome. Thanks.
• Suzuki Swift 2012 - Battery Disconnection 5 Jan 2015 (Forum)
  I am going to remove the battery for charging, Can I expect any problems with the ECU  memory? I realise that the radio will need re-coding.    
• Rover 75 Cdt 4 Nov 2003 (Forum)
  Fuel consumption as dropped over the last week down to around 32/34 mpg. - no ECU codes have come up Any idea\'s?? perhaps one of the sensors K2
• Skoda Roomster - New Battery 13 Dec 2022 (Forum)
  Skoda Roomster 2014 Petrol I am about to change a failing battery. Does the new battery need to be registered to the ECU?  If it is not done, would this affect the life of the new item?  
• cold idling problem - suzuki 30 Apr 2005 (Forum)
  My girlfriends suzuki alto does not idle properly. its even worse when its cold. The engine has an ecu. Anybody any ideas what could be causing this?
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  Engine problem with SEAT Altea 1.9 TDI 4 Apr 2012 (Ask HJ)
  I have a Seat Altea XL 1.9 TDI 59 reg and every few weeks it refuses to start - it normally kicks over first time no matter what the weather is. SEAT installed...
• Vauxhall Corsa 06 1.2 SXI+ (twinport) - No codes but.... 28 Feb 2019 (Forum)
  A couple of days ago the car stalled whilst on idle. No ECU lights on the dash, checked the fuses and an ecu one had blown. Replaced it ,turned ignition on and the coilpack started to smoke. Any ideas please? Thanks in advance. Dave