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.
Posted: Wed Sep 05, 2018 3:49 pm
Joined: Nov 27, 2010 Posts: 11358
Trade Rating: +9
Location: What's it to you? ? ?
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.
2016 Peugeot 308 Puretech 1.2 petrol 130bhp Allure hatch with panoramic roof.
Posted: Sat Sep 08, 2018 10:43 am
Joined: Aug 31, 2018 Posts: 2
Trade Rating: 0
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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