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• Volvo V60 - Fault tracing and misleading diagnostic codes 11 Nov 2013 (Forum)
  Here's a little tale of how diagnostic codes stored in ECUs can be misleading and ambiguous when trying to trace the true cause of a fault. Just under 3 weeks ago, I had the 'emissions warning' lamp light up in my 2011
• Vauxhall Corsa - Garage shears off glowplug: who's responsible? 8 Sep 2012 (Forum)
  a diagnosis.  The fault code they reported was something along the lines of the ECU wasn't getting a signal / talking to a glowplug.  Their course of action was to replace the glowplugs. Within half an hour, they'd rung to say that although 3 of them had come out fine, one hadn't but had
• Renault Clio II Expression - Renault Clio 2001 1.2 16v - Electrical Fault Light 8 Jun 2012 (Forum)
  the problem temporarily.  My husband has changed the air filter, spark plugs and checked ECU wires for chaffing.  They were already taped up but he removed the tape and inspected them, there didn't seem to be any damage to the wires themselves, just the plastic was slightly worn on one or two
• Ford Fiesta (2002 - 2008) - 2002 1.4TDCI ? injectors or pump 26 May 2012 (Forum)
  on accelarator and it kept stalling never done that before.We have been told lots of waffle over the last few months.It has supposed to have had the exhaust cut in half to test the pressure,ecu checked and fuel pump flow.Two of the injectors have been taken out again and the spray was ok.Someone told us
• ford fiesta 1.25 zetec T reg - over revs but not stalling or power loss 2 Apr 2012 (Forum)
  . But if im driving along as normal and gear change from 3 to 4 etc, revs DROP for a split second.  Ive tried an ECU reset about five times now and still the same (i cant find appropriate fuse so just been disconnecting the battery)  so i disconnected the VSS (triangle plug thing that sits
• VW Passat 1997 TDi 110bhp - VW TDi revs on hot start and no power 11 Mar 2011 (Forum)
  ) faults cleared in ecu. He thought it made an improvement and to be fair it did but it's still way down on power and still revs on starting when hot. Any suggestions welcome, I will try and pressurised the fuel system tomorrow as per another thread to see if there is an air leak using the rag in tank
• SEAT Altea (2004 - ) - 55000 mile report 22 Oct 2009 (Forum)
  to be the downfall of this car, we chose to sell in the end as the time between each failure never really exceeded a few months, here are some highlights: Electronic throttle failure from delivery, caused ECU to disconnect throttle control which was exciting on the motorway ? this required 13 dealer visits over 6
• Nissan Primera III (1999 - 2002) - 01 2.0 Fuel economy has nose dived - ideas? 18 Jan 2009 (Forum)
  the information above, and better still how to test components? I think I can put the ECU into diagnostics mode to see if the lambda sensor is cycling through open/closed loop often enough but that's about it. Any ideas most welcome, thank you.
• Peugeot 806 MPV (1995 - 2003) - 01 2.0 Expert HDi 110 black smoke and poor economy 2 Nov 2008 (Forum)
  with the fuel that the ECU thinks it needs - end result is over-fueling and black smoke. I have disconnected the exhaust where the cat connects to the centre silencer and the cat seems to be clear. The engine runs a little better and the turbo seems to come in a bit quicker, but it's not a massive difference
• Peugeot 406 (1999 - 2004) - 02 2.0 HDi low power after hitting flood. 23 May 2008 (Forum)
  have caused a permanent change in the way the the common rail fire each injector? Its obviously delivering fuel, more than before, yet I have really low power in the lower revs. Overtaking is now a memory!! Tried the disconnect battery thing to reset ECU, all this got me was an "ENGINE IMMOBILISER
• 03 Laguna repair - opinions needed 13 Jun 2007 (Forum)
  responsible for a fatality if we'd been unlucky. The service guy said (direct quote) that the AA were 'drama queens', and that there's a backup in the ECU that ensures that the car goes into limp mode if the sensor fails, and won't simply cut out. So, who's right? Let me add that the garage did not apologise
• Ford Zetec 1.8 high idle 1 Sep 2004 (Forum)
  , the emission control valve and the HEGO unit. It may be very slightly better but not much. Anyone got any Ideas what the problem really is? What should I get done next? What of the engine management system is left to replace? Mass flow detector? Engine temperature detector? Throttle position detector? ECU? I
• Ford focus econotec diesel 2008 - Car chooses when to start - Help!! 21 Aug 2021 (Forum)
  diagnostic equipment on it and said there's fault with the battery and that is why it sometimes won't start. We told our mechanic and he said he checked the battery and it was fine. He now thinks the car issue could be with the instrument clusters - ECU's/PCM's (engine control module/power control
• Peugeot 308 CC - Faulty engine control system 17 Aug 2020 (Forum)
  speeds without me noticing any degradation in performance. The technician finally had a look at it yesterday and told me that its problem with the valve (might need cleaning) which is causing issue with the ECU. They contacted warranty and was told that this is not enough and they need to give more
• Ford Focus II (2004 - 2007) - 05 1.6 Engine System Failure on 115PS 12 Jan 2020 (Forum)
  what my be the root of this problem. I have heard it could be a speed senor, lambda senor, engine coolant senor or problem with ECU itself. I also understand that a main dealer can charge £100 or more just to plug car into diagnostics machine without actually fixing problem. What is my best plan
• Peugeot 307 - Peugeot 307 (2001 - 2007) - 03 110, Anti Pollution 4 Jul 2019 (Forum)
  warning Car is now on 60K miles. Can't see anywhere in the paperwork that the 50K topup/service was done VIN No. is  a HZC vin no and I dont know how to find the model of the ECU as i've read that one code can have three meanings dependent on this. Help!! Thanks
• Fiat Punto 1.9 JTD 85 - Error code P0380 but 2 dealer got no clue 21 Mar 2016 (Forum)
  on other forum of Vauxhall, Saab and Alfa ECU sorted corrupt data and it stuck forever. What they did is remove led on speedometer icon coil and ignore it. What about MOT if it can go through?? Spend total £312! I have already waste my money! I don’t want to waste anymore further
• 
  Loss of Drive 20 Jul 2015 (Ask HJ)
  Audi quattro A3 3.2 DSG 2006. Car languishing with no-one knowing what to do? Free wheeled to a stop. no crunching. Now all 4 wheels locked. The car lost...
• E46 330D Touring 2001 - E46 330D Touring spluttered to a halt and now will 12 Apr 2013 (Forum)
  and may be coming up due to the battery voltage dropping off and the ECU saying im not happy about this glow plug error well that aint no big thing but shouldnt stop the engine from starting. So next plan is to change high pressure pump as im fast running out of options unless anyone on here can
• Peugeot 307 HDI 2002 110BHP - Anti Pollution 16 Dec 2011 (Forum)
  communicing with the ECU. Not too sure what has happened but I really want to get the car fixed... I am taking the car back in Tuesday but I would like advise first of what it could be???? Not too sure if the original garage has disturbed somehting when removing the gear box?? Kind Regards