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• Ford B max 1.4 zetec 2013 - Not starting 20 Oct 2023 (Forum)
  No warning lights showing, but Garage "suspect" instrument cluster problem (apparently common) repair cost if unit sent off about £150 ish + vat plus labour to remove etc. Ford main dealer will obviously be more if a new instrument cluster. Other thoughts are ECU failure New ECU is abot £750 plus vat plus fitting, but all of the above depend on Ford dealer diagnostics. There is an indie with access to the software but 4 week wait.   Thoughts, especially Eleki and AC doc?
• Vauxhall astra 1.9 - Astra electric issues 24 Oct 2021 (Forum)
  Including the 80amp strip fuse and the larger fuses above the fusebox. Could it be no power going to fusebox? Where does the fusebox get it's power? From ecu?   Thanks
• Ford Fiesta MK6 1.4TDCI - Ford Fiesta Stalling 26 Apr 2021 (Forum)
    I took it to the garage when it started it doing it and they couldnt find any errors. They blamed the ECU, however they admitted that it might not be the cause, and therefore they adviced me to use it until it gets worse and hopefully they could find some kind of error on the system. Ive got no problem in changing an ECU, however I would like it to be 100% clear that the problem will be fixed before I go through the expense.
• Ford Fiesta Mk4 1.25 16V 1999 - Coolant temperature sensor / gauge 20 Aug 2018 (Forum)
  So unless there's another coolant sensor I can't see I assume the sender unit connects to the ECU which has a relay output to control the radiator cooling fan and a signal output to drive the gauge. If I'm correct then either there's a wiring fault or the ECU is faulty. Does anyone have any wiring information for this vehicle?
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  Is a Smart Roadster a future classic? 13 Nov 2017 (Ask HJ)
  Is a Smart Roadster Brabus a future classic?
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  Starting problem 9 May 2016 (Ask HJ)
  I have an intermittent starting problem with my Jaguar XJS. The petrol pump should run for 10-15 seconds after switching the ignition to prime the system...
• Galaxy EcoBoost Powershift Reversing Lights Failed 5 May 2016 (Forum)
  A live feed is coming off gearbox to control unit when in reverse, although it's hard to trace whether it's a multi pole switch that may have a separate feed for the reversing lights - all extremely complex and may even be an internal switch on powershift gearboxes? I have disconnected battery for an hour to do an ECU reset and still no change. There are no fault codes present. The auto electrician and local garage are suggesting an ECU module change, so a very expensive fix. It's a post Feb 2010 so everything is module controlled rather than conventional switches, relays and fuses.
• hyundai i40 - supermarket fuel VS branded long term test review 17 Mar 2016 (Forum)
  I wanted to see if I was paying over the auds using bp ultimate or if I could get the same results for 10p cheaper. I filled up with supermarket fuel, let it go to half a tank, filled up again and re-set my ecu. I then did my normal run on the motorway where I average 67.5 MPG. With supermarket this dropped to 61.2MPG. Around town my normal was 55 MPG,  again with supermarket fuel this dropped to as little as 41MPG.
• Audi Cabriolet 2.6 V6 final edition 1999 - Instrument Panel 8 Aug 2015 (Forum)
  To this end I Recently had the original cluster repaired and tested (everything worked correctly)  by ECU testing ,and refitted to the car. Now I find that the Temp and Fuel gauges work but do not show the correct readings (both to Low). Everything else is fine. Only the temp gauge was faulty when the cluster was originally removed.
• Vauxhall Astra 1.6 SXI - Engine light on and flashing 14 Jul 2015 (Forum)
  My son's Astra 1.6 SXI 52 plate has its amber engine light come on and then flashes and goes into limp mode, easy fix you would think. Firstly we had the car in a garage and ecu fault codes checked, came up with coil pack, I replaced that but no difference found, booked it into Vauxhall main dealer garage and they diagnosed the coil pack. They replaced the coil pack and plugs suprise suprise still the same,they then said it was the ECU so they tried that, Oh oops still the same,next came the big suprise sorry we're stumped so there we are still stuck only saving grace is he's only had to pay for 2 diagnostic's, the car is back on its origonal coil pack.
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  Loss of power in a Mitsubishi Outlander 9 Jun 2015 (Ask HJ)
  Our Outlander occasionally loses power at 60-80mph, no warning lights on dash and problems clears when engine is switched off and back on again. Any ideas...
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  Ford Focus misfire 5 Jun 2015 (Ask HJ)
  My Ford Focus has a misfire during warm up and at some other infrequent times. No dashboard lights showing. First diagnostic showed no fault. ECU temperature...
• Vauxhall Zafira 2.0 DTi 05 plate - Programming of new ECU codes - neccessary? 30 Jan 2014 (Forum)
  I own a Vauxhall Zafira diesel which has done approx 70,000 miles. I have had problems with heavy steering and with the car intermittently losing power...
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  Is it possible to disconnect a battery isolator without sounding the alarm on my Rover 45? 21 Dec 2013 (Ask HJ)
  I keep a 10-year-old Rover 45 garaged abroad. I have fitted a simple battery isolator, and even after five months away it still starts first time on reconnection....
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  Why do DSG 'boxes judder? 26 Nov 2013 (Ask HJ)
  My wife has owned a Mk6 Volkswagen Golf DSG for nearly three years. She has loved it with one exception, the auto gearbox, which always shudders when moving...
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  Can I have the DPF removed from my Volkswagen Golf estate? 19 Oct 2013 (Ask HJ)
  A local company has offered to remove the DPF from my Golf estate, reprogram the ECU and leave it looking identical underneath. They claim better mpg and...
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  What caused my Audi TT's window to jam open? 3 Aug 2013 (Ask HJ)
  My driver side window regulator recently failed on a 5-year-old Audi TT 2.0 TFSI. It ruined a weekend as the window jammed open and we had to cancel a...
• 2005 Picasso Hdi 50k miles - Citroen Picasso engine management light 26 Jul 2013 (Forum)
  I'd have got it one for a day and light would have came on again, but they said the diagnostic machine always through up a different fault, Fuel pressure sensor has also been replaced, Engine management light came on again and it was decided to replace the ECU ... All sensors, tests and ECU has cost over £1000! Diving the car home tonight and low and behold the engine management light has came on again!! Can anyone help me as to what it maybe??? The light comes on and the car appears to lose power but will drive very slowly ....
• Astra G 1.8 16V Sxi - Misfires, surging and hesitation 13 Jun 2013 (Forum)
  I bought it privately and was told going in that there was an issue with O2 sensor. £300 later and the O2 sensor wasn't the issue, someone had been monkeying with the ECU and had bent a pin. The ECU has been remapped, the O2 sensor replaced etc. That was 6 weeks ago and the car has been fine ever since.
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  More problems on an X-Trail following clutch replacement 21 Apr 2013 (Ask HJ)
  Recently I changed the clutch of an X-Trail 2008 2.2 tdi but when I start the vehicle the engine revs until 3000rpm and the check light comes on I still...