rolyk Posted January 26, 2015 Share Posted January 26, 2015 I have been experiencing difficult starting for the last couple of years. It has been into three diesel specialists and the fault is still there. I am now at a loss where to go next and would appreciate any advice. I took it to a Peugeot main dealer 2 weeks ago and they did yet another diagnostic check but were reluctant to take it any further. I suspect that they were worried about presenting me with a large bill for the fault to still be present. The symptoms are - Fault Code P020 Open Circuit - Temporary Fault code P0603 Electrical failure - Temporary After being left for few days in cold and damp weather the engine cranks over but does not fire. Occasionally it starts then stalls after a few seconds. It won’t immediately restart. It usually, but not always, starts after leaving it for a few minutes. Probably coincidental, but after opening the bonnet and moving the ECU wiring loom it sometimes starts. When it does eventually start the engine management light is on and stays on for a while. Once started it runs normally without any misfiring and will restart during the day without a problem. Crankshaft and camshaft sensors were replaced last year. The earth strap has been replaced. The fuel filter housing has been replaced as I thought it a possibility that fuel was draining back to the tank. In the summer it normally, but not always, starts first turn of the key. I remember from what Nick (Euroserv) has said on some of his posts that the ECU wiring loom can be suspect. And when I had an alarm fitted by Vanbitz when the vehicle was new they pointed out that the high level wiring loom was very close to the wiper mechanism. I looked and couldn't see that it was a problem so did nothing about it. So if anyone has any thoughts on the matter I'd very much appreciate their advice. Roly Link to comment Share on other sites More sharing options...
euroserv Posted January 26, 2015 Share Posted January 26, 2015 Hi Roly, You really must get to the wiring underneath the fuse box. There is a blue plastic plug connector known by those that work on these vehicles as 'Rusty Junction'. You may find that one or more wires are corroded and possibly even one is adrift from one side of the connection. They can be repaired quite easily but beware if there is more than one broken because you will get into trouble if you mix them up! If not here then the loom that goes from this junction in either direction will have to be carefully unwrapped to find a pair of wires shorting somewhere. It's very laborious but this is where electrical faults hide. Access to the loom is much easier with the nearside headlamp removed. Nick Link to comment Share on other sites More sharing options...
rolyk Posted January 26, 2015 Author Share Posted January 26, 2015 Thanks Nick. I was hoping that you'd respond and that's really useful info. My stepson is an avionics engineer and well versed in dealing with tricky wiring problems so I'll wait for his next visit in a month or so and we'll have a go at fixing it. I'll keep you posted of the outcome! Thanks again. Roly Link to comment Share on other sites More sharing options...
rolyk Posted February 20, 2015 Author Share Posted February 20, 2015 Here's an update - Following Nick's advice I removed the offside headlamp, unplugged all the connectors, unwrapped the looms which were accessible and checked the individual cores for any obvious imperfections. The looms, plugs and sockets were all looking to be fine with no signs of corrosion. However, the pins to the plug connecting to the ECU had what looked to be tiny beads of silicone attached to all the pins. I carefully cleaned it all out and reassembled everything. One thing that was obvious was the amount of dampness on that side of the engine bay so I re-sealed the scuttle tray to the windscreen, paying particular attention at both ends where the soft plastic "wings" had lifted, allowing water to penetrate into the bay. I re-sealed this with Sikaflex. I had installed drains to both end trays when the vehicle was new. I did this a fortnight ago and, to date, it has started every time. I'm still not totally convinced it's cured the problem, but that's probably just my scepticism after the last 30 months of the uncertaincy whether it would start. So thanks Nick for pointing me in the right direction. I'm just keeping my fingers crossed! Link to comment Share on other sites More sharing options...
euroserv Posted February 20, 2015 Share Posted February 20, 2015 You are welcome but i share your hesitation to uncork the Champagne. The chances are that while you were fishing around you disturbed the wiring enough to 'un-short' the problem. If it comes back I am sure you will have a couple of wires shorting in the loom from rusty junction to below the headlamp. It will take some finding; but it's there! I have fixed LOADS of these! Link to comment Share on other sites More sharing options...
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