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 Posted: Wed Sep 05, 2018 12:11 pm |
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Joined: Aug 31, 2018
Posts: 4
Trade Rating: 0
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It's my first post on this forum, seeking help on a serious problem with my Peugeot 206 1.4 75PS (2002).
The problem is that one cylinder stops when the engine gets somehow hot (after about 10 km drive). The diagnostic shows
a problem on injector 4 circuitry (P0204). I have changed injectors 1 and 4, checked the wiring to the ECU, everything ok.
However, the problem stands.
It's very probable that there's something wrong with my ECU. Since the cost of replacing it is substantially high and since
I have a good experience with electronics, is it possible to try to troubleshoot the PCB ? It's maybe just a bad capacitor or the
injection driver chip which needs replacement. Is there any info available on the ECU (i.e. schematic) ? It is a SAGEM type.
I would really appreciate any help. Thanks in advance.
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Posted: Wed Sep 05, 2018 2:49 pm |
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Joined: Nov 27, 2010
Posts: 11520
Trade Rating: +10
Location: What's it to you? ? ?
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Are you 100% sure its actually the injector at fault?
The ECU on the 206 is smart enough to notice a coil pack or spark plug misfire & shut down an individual injector to protect the cat from being poisoned by unburnt petrol, but as it has shut down the injector it then reports an injector fault when you read the fault codes.
If its got NGK spark plugs fitted then change then for Bosch or Denso ones, NGK spark plugs are known to cause issues with the misfire phase detection system fitted on the 206.
If its got a Sagem coil pack fitted, bin it as that's another known issues ( id be shocked if its still got the factory fitted Sagem coil pack ) & get a decent non Sagem one, Bougicord is the coil pack of choice.
The ECU is pretty bulletproof, plus its full of potting compound to protect the PCB, I very much doubt its the ECU at fault.
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| Toyota C-HR GR Sport 2.0 Hybrid with JBL & Alcantara packs. | |
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Posted: Sat Sep 08, 2018 9:43 am |
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Joined: Aug 31, 2018
Posts: 4
Trade Rating: 0
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Thanks a million for your reply. I will check the coil pack + spark plugs as well as you suggest. I haven't done so because the diagnostic didn't show anything about these two yet !
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Posted: Tue Oct 02, 2018 9:17 am |
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Joined: Feb 10, 2010
Posts: 4266
Trade Rating: +4
Location: Palestine
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I agree with MrBSI,usually what cause this is the coil pack,or bad spark plugs.
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Posted: Tue Nov 27, 2018 4:32 pm |
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Joined: Aug 31, 2018
Posts: 4
Trade Rating: 0
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Posted: Wed Nov 28, 2018 2:13 pm |
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Joined: Nov 27, 2010
Posts: 11520
Trade Rating: +10
Location: What's it to you? ? ?
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Have you checked / replaced the injector wiring harness?
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| Toyota C-HR GR Sport 2.0 Hybrid with JBL & Alcantara packs. | |
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Posted: Wed Nov 28, 2018 2:44 pm |
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Joined: Feb 08, 2010
Posts: 7045
Trade Rating: +5
Location: In the garage
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Do these use semi or sequential injection? Do they have a camshaft sensor?
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| 2001 GTi 138, Bilstein Sprint dampers, H&R springs, 21mm Peugeot Sport torsion bars, 22mm rear ARB, Peugeot Sport Group A wishbones, 283mm discs, Goodridge stainless hoses, Maniflow 304 grade 4-2-1 2.5" manifold and system, 200 cell cat, Richard Longman head, 45mm Jenvey throttle bodies, 9.5mm TB spacers, 90mm air horns, Jenvey throttle linkage, Jenvey fuel rail, Aeromotive and Goodridge fuel fittings and braided hose, ITG sausage filter, Radtec custom radiator, Piper Ultimate Road cams, Piper vernier pulleys, Omex 600 ECU. Saxo electric PAS pump, Vibra Technics engine mounts. Samco coolant hoses, TTV steel flywheel, 4.76 final drive ratio, 307 CC 180 ratios. 2019 BMW 530i. 2017 Mercedes C300 convertible. | |
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Posted: Wed Nov 28, 2018 3:08 pm |
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Joined: Aug 31, 2018
Posts: 4
Trade Rating: 0
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Problem solved : it was a bug in the diagnostic software (Delphi).
After checking with an oscilloscope, the faulty injector was #2 instead of the reported #4.
The software wrongly reported cylinders in the order of firing instead of the physical order ! Physical 1-3-4-2 was reported as 1-2-3-4. So #4 was actually #2.
Still cannot believe it.
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Posted: Sun Dec 23, 2018 8:27 pm |
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Joined: Feb 10, 2010
Posts: 4266
Trade Rating: +4
Location: Palestine
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Good that you got this sorted,and thank you that you wrote what was wrong so that others can read this and help them to solve a similar problem.
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