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• 
  Is my keyless Audi A8 particularly susceptible to theft and how can I prevent it? 10 Jun 2012 (Ask HJ)
  I have a one-year old keyless Audi A8. I have read reports about the theft of such cars. My local Audi dealer says he is not concerned and has had no...
• BMW 5-Series E60 (2003 - 2009) - 2006 2.0 Non existent Diagnostics 22 Mar 2012 (Forum)
  charged for wasting their time etc etc. Not to mention that if he hadn't seen this sticking relay issue before another garage/technician might have started changing the components being reported as faulty on the iDrive, fuel pump etc. Apparently this relay provided power to the ECU, instead of the fault
• Corsa C (51 Plate) Easytronic - Vauxhall Corsa C Easytronic Losing Power/Gear 26 Jan 2012 (Forum)
  request via CAN B-06 and I've read people suggesting replacing the Crank Shaft Sensor to it being the clutch or gear selector or ECU. I know the age of the car means it just might be the major
• 
  Rough idle on a Peugeot 406 HDI 1 Jan 2012 (Ask HJ)
  My 406 hdi has a rough idle. When I rev it up it seems fine - a little misfiring, but soon it hits the turbo and it's OK. It feels almost like it's running...
• VW Polo 1.2 2002 - Polo failed MOT on high CO 16 Sep 2011 (Forum)
  their Bosch reader on it, and said the ECU was occasionally reporting a misreading airflow, which he thought was throwing out the fuel mix, which was confusing the lambda sensor, putting the MIL on. This year, it's failed its MOT. The Hydrocarbons were OK (a little high, but within spec
• 
  Why does my Volkswagen Transporter's DSG automatic gearbox lag before responding to the accelerator? 20 Nov 2010 (Ask HJ)
  My new Volkswagen T5 Transporter 2.0TDI 140PS has a DSG gearbox with a hazard. After slowing down for a junction or roundabout there's several seconds...
• 
  Can I reject the Vauxhall Zafira I bought earlier this year? 9 Jul 2010 (Ask HJ)
  I wonder if I have a case to either reject or get a replacement of my Vauxhall Zafira that I purchased on 8 March this year. It arrived with scratches...
• 
  What's wrong with my problematic Toyota Picnic? 28 Jun 2010 (Ask HJ)
  I have a Toyota Picnic 1998 2.0-litre petrol manual and it's driving me to an early grave. After £700 spent it's still got the same fault. For some time...
• 
  Oldsworth 3 Apr 2010 (Ask HJ)
  All the cars built within the last 10 years seem to look much the same: quite boring except for the classier vehicles. They all seem to need a computer...
• MG MGF (1995 - 2002) - Modified MGF - worth a punt? 2 Mar 2009 (Forum)
  bearings replaced. - Piper H285 cams, piper vernier cam pulleys - Emerald programmable ECU. - Full gas flowed head (about 25% above standard), new valve springs - 60mm throttle (flows approx 23% above standard) - Cold air box with 70mm ducted intake feed. - New water pump fitted - Classic Camaro vortex
• 
  Remote possibility 14 Feb 2009 (Ask HJ)
  We own a 2002 Golf, bought in 2004, and a 2005 Octavia, bought in the Spring of 2006. The cars are kept side by side on our drive. Both have remote central...
• 
  Electric drain set 17 Jan 2009 (Ask HJ)
  I have a 2000 Audi 2.5 TDI which suffers an electric drain somewhere in the system, if I don't start the car for 3 days the battery will be too low to...
• Vectra 2.0 DTI power problems 24 May 2022 (Forum)
  at my expense as i have read in other posts. By the way, no warning lights or ecu fault codes have been recorded, the car has done 130k.
• Citroen Berlingo Multispce 1.5 HDI adblu Feel 2015 - Battery /alternator problems Need Help please! 17 Feb 2022 (Forum)
  to start car. Taken to mechanic had 2 new batteries still happening . RAC breakdown mechanic diagnose alternator prob. Alternator (2 tried)  replaced under warranty. Still not charging battery. Mechanic baffled? Before I take to a Citroen specialist has anyone had this problem . ECU remapping has been
• Ford Fiesta - Door won't open from outside 26 Dec 2020 (Forum)
  Had a recent problem with my 2017 Fiesta Titanium. My wife complained that she could not open the passenger door, but I could lean over and let her in. I couldn't get it to work properly, and the local agent seemed surprised, but didn't think it was connected to the electronics, where the ECU
• Skoda Octavia Estate - In a quandary but a nice one 14 Apr 2019 (Forum)
  as well. But now its getting on a bit, only 80k miles tho and we have now sold the caravan, ( but still tow wood occasionally).   The quandry you ask. The value of the C5 is maybe 1500 trade in, so if it blows, no big  deal we "only" lose 1.5k. It does have a fault in its ecu
• Any - The death of recycled parts? 24 Oct 2017 (Forum)
  to the cars main computer. Fair enough but he claims that new replacement parts have a one time code to couple up . If the car is scrapped and the parts removed the unit has a one time access to couple with the car's ECU and hence will fail to work a second time Another example he claims is the Main Dealers
• Renault Clio S 1.4l 8v - Wreg Clio turns over but won't start. 5 Jul 2016 (Forum)
  changed the crank sensor but no change. I even tried a different ecu/bcu/key kit and it was no different. Annoyingly the wiring on it doesn't match anything in the Haynes manual so before I begin the tiresome task of checking ALL the engine wiring can anybody help with this problem? Any ideas of things
• Jaguar X-Type 2.0d - Positive Story 22 Feb 2016 (Forum)
  We're all used to horror stories and reading HJ too much with accounts of failed DPFs, ECUs, etc. and huge repair bills is enough to give you nightmares and visions of imminent bankruptcy.  So here's a positive story - I think so, anyway. Took the car (2004, 157k) in for service
• Skoda Roomster - VW Recall list 20 Oct 2015 (Forum)
    the blue additive was probably switched off vw models but Roomster does not have this but scr? I would like to know how VW ecu when running cheat mode can get all the NOX past the scr/ dpf, does it also switch off the EGR valve. When running in non cheat mode after recall i.e. after being