My son's 208 suddenly ran rough, no power and idle was very rough. The EML was on, and diagbox pulled a P1339 code. On a restart it would rev, so not in limp mode straight away, but no real power. Rad fan ran on at high after engine switch off. Interestingly. it would start with any coil disconnected, but ran even worse, no matter which cylinder was pulled. I was hoping to diagnose which was the bad one !
A Google search seemed to indicate coilpacks, so I whipped the plugs out - the ground electrodes on two were very eroded, almost triangular in section. Number 3 (cambelt end) was also a bit blacker than the others, but not quite as eroded.
A set of three new plugs and a coilpack on number 3 just to be sure and its back running fine again. Smiles all round !
Peugeot 208 1.2 Petrol rough idle, no power and P1339, FIXED !
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