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• Jaguar XK8 and XKR (1996 - 2006) - Engine Warning Light and consequent disaster. 28 Jan 2008 (Forum)
  ,they said they had finally found the fault,an ECU circuit leak on the Left Hand Wiring Harness,so they ordered one,fitted it,then said I had to pay for it because it was now out of warranty!!! I objected saying they hadn't actually fixed the fault that i had reported under warranty,originally,that this had
• Vauxhall Corsa D 2009 1.3 CDTI - Intermittent Engine Start 18 Jan 2016 (Forum)
  (as they couldn't replicate it initially) they advised me to see a Diesel Specialist as they didn't want to start replacing parts and costing me a fortune. Ocassionally the engine will fire but not hit enough revs to start the engine fully, the only error on the ECU was a boost pressure sensor which was cleaned
• KIA Cee'd - feedback on reliability of high mileage ceed / i30 21 Nov 2015 (Forum)
  to be many endemic diesel faults mentioned in HJ's car by car breakdown. Nor do a search on the Internet reveal many diesel specific issues (except the odd turbo failure). For cars of this age, the major failures seem to be electrical related such as, ECUs, ABS, Power steering, or the more usual
• Honda Civic 1.5 Automatic VTEC hatchback, year 200 - Poor fuel economy 7 Jul 2015 (Forum)
  looked at this fuel consumption problem. They replaced the spark plugs, checked ignition timing, valve timing and clearances and fuel mixture which were all within manufactures specs. They checked the air filter and air intake system and then carried out a ECU clear and re-learn. They ran
• X plate Citroen Saxo diesel - 2000 Saxo Diesel cold running 63000 miles 24 Jan 2015 (Forum)
  Device) which assists cold start, one of these was listed for my car but it doesn't fit as there is a blanking plate where it should go so I guess it fits an earlier model. Will try a temperature sensor to see it this helps as I assume it is linked to the ECU and replace the fuel filter as they are cheap
• Vauxhall Corsa D '09 Life 1.0 L - Power steering and ABS failure 8 Jan 2015 (Forum)
  . Is this a common fault of any sort? Vauxhall have reset the ECU, courtesy of £60, which is the same that my local garage did (who said i should go to vauxhall). The reset didnt do anything. They are saying they will need 1-2 days to look at it at maximum of £250 labour just for inspection
• VW Passat 1.9 Tdi 2004 AVF engine - VW Passat will not start 29 May 2014 (Forum)
  did not make any improvements Connected a WiFi ELM 327 unit to the OBD connector. There were no errors stored on the ECU. It did however mention DTI 1 misfire when i tried cranking the engine. Is this still a fuel problem? Is it worth removing the pump from the tank and cleaning the filter screen
• Ford Fiesta - Charging £500+ extra for 'standard' engine 29 Oct 2013 (Forum)
  . That is to say they are charging £500 extra for a different software or firmware mapping in the ECU. The data show that the low power 60 PS (artificially 'limited' engine) offers much slower acceleration and lower top speed but identical official government fuel economy and CO2 figures so there is no VED
• Renault Clio II - Renault Clio misfire and low compression 22 Jul 2013 (Forum)
  on Cylinder 4, furthest from gearbox, is all sooty whereas the rest are look great, cylinder 4 is also 30psi down on all the other cylinders, there is a slight popping noise at the exhaust I have changed the wiring loom that goes from the ECU to the injectors and that, due to it being chaffed a little
• Volkswagen Golf GTI - Rough idle 22 Apr 2013 (Forum)
  then picks back up. This the drop in revs occurs momentarily but on a consistent cycle. Very occasionally the car stops doing this but only briefly. Can someone tell me if this is electrical or fuel related? I have not had the ECU tested but it feels like it is something really simple - if only I
• Mazda 6 - 2l petrol Mazda 6 stalling at junctions 11 Mar 2013 (Forum)
  slightly occasionally when stationary and idling though, although I have noticed this happen in the past when I've not had the stalling problem. I'm presumably going through the ECU-relearning process at the moment, but I've been through this before when I've had reason to disconnect the battery, so
• Chrysler Grand Voyager - Problems after jumpstart 10 Mar 2013 (Forum)
  either fried the ECU controlling auxillary lights etc or shorted out some wiring. Now I was told that I would need to fight it out with customer care which doesn't work weekends! So I am left carless facing large repair bills. Any ideas please?  
• Renault Megane 1.5dci 2002 - Idle issues - Intermittant fault 19 Feb 2012 (Forum)
  on 3 cylinders. After a period of time (Normally 10-20 secs but once or twice as long as a min) the revs will increase and I get accelerator response. I'm guessing that the ECU is not letting the car rev due to the low idle speed. This fault never happens when the engine is started
• peugeot 206 2.0 hdi 2001 - engine cutting out 16 Nov 2011 (Forum)
  than the ECU (because honestly i would cry!) The cars spent more time parked up than being driven!  Oh, to add insult to injury the night she died she was on her way to the test centre to be MOT'd!  Any kind of help or ideas or even rough guesses would be appreciated.  I'm
• VW Golf III 1.8 Driver 1994..e.c ABS - VW Golf III wont start when warm 15 Nov 2011 (Forum)
  fine, left it running til warm then switched off, wouldnt start again. Aaaargh! So next on my list is the ECU relay,no.30. I have a new one in my hand, but looking at the relay board,position 3 where the manual says it is, and also the guy at local VW dealer confirmed after giving him chassis
• Bye CR-V, hello… 9 Nov 2010 (Forum)
  problem was the battery going flat. This was last winter and the ECU didn’t shut down the electrics so there was a constant drain, after three days it wouldn’t even turn over. This was sorted with a software update. All the above were done without question under warranty
• Peugeot 306 (1993 - 2001) - 98 1.9 Running fine, now won't start! 5 Feb 2010 (Forum)
  to suggest a 'bad earth'. I have disconnected the battery for approx 30 mins so as to try to reset any fault code in the ECU. I have cleaned the battery terminals, the earth connection to the gearbox, and chassis. This made no difference. I have checked all the fuses, both under the stearing wheel
• Ford Mondeo III (2000 - 2007) - 01 1.8 Do Engine Warning Lights Get Bored? 10 Dec 2009 (Forum)
  months down the line the light went off by it's own accord (no the bulb didn't blow). So what does this mean? The ECU is ignoring it based on some sort of time elapsed function or the fault has gone for long enough for it to decide to stop reporting it?
• Ford Focus (1998 - 2004) - 02 1.8 Revs to 3000 rpm then dies off 15 Nov 2009 (Forum)
  soldered to both ends. The problem was solved for a few months but returned. I demanded that the correct wire be used instead of the temporary fix, but to no avail. Fault codes? What fault codes?? The ECU just records nothing amiss! The car has currently some 30k kms. I had solved it again temporarily
• Renault Clio III (2005 - 2009) - 07 1.4 intermitent problems just after starting 13 Nov 2009 (Forum)
  a garage mechanic can work out what is wrong, looking on the web i thought it could be something to do with an ECU failing to tell the choke to increase fuel when its first needed. First time in garage they did a diagnostic and said there was a recognised Clio problem and replaced the accelerator cable