308 1.6 16V VTI (EP6 engine) P1339 Fault code - Peugeot Forums
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Old 19-09-18, 12:37 PM   #1
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Question 308 1.6 16V VTI (EP6 engine) P1339 Fault code

Hi,

I own a Peugeot 308 1.6 16V VTI (EP6 engine 5FW) 2008 with 250000km (155000mi). And for the last 14 days I am having trouble with misfiring?.

When the engine gets warm after some driving (usually on the highway), then when I stop at the stoplight I get a Depollution system faulty message on the display, check engine light and a P1339 code (sometimes also a P1340 and a P1336). When the fault occurs the engine is running very rough due to the fact that ecu seems to cut off the spark to cylinder number 3. The fault always manifest it self when engine is idle after a drive (at the stoplight). If I switch the engine off and wait for a few seconds and the start the engine again it is running on all 4 cylinders again the Depollution system faulty message and check engine light stay on after restart. There is no trouble starting the engine.

So far I have tried the following:

-swapped ignition coils between cylinders
-swapped spark plugs between cylinders (they were changed at 226000km)
-cleaned and swapped injectors between cylinders (also added fuel aditive for injector cleaning)

Even tried with new spark plug and coil on cylinder 3 but the fault stays the same.

The compression test showed normal compression on all 4 cylinders

I have read about the failing high pressure fuel pump but as far as I can tell this engine (without turbine) does not have it.

The codes were read with Texa IDC5 software and Wurth WoW as I have no access to a diagbox and no member is near my Country.



Any suggestions on a fix would be greatly appreciated.

P.S I know that cylinder 1 is at the gearbox side
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Old 19-09-18, 06:29 PM   #2
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Remind me :5VF is with the turbo and 5FW is without? Is that the prince engine ?
Carbon buildup ?
Why two posts ?
https://www.peugeotforums.com/forums...d.php?t=329884
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Old 19-09-18, 06:52 PM   #3
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Duplicate post deleted
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Old 19-09-18, 07:49 PM   #4
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Sorry again for the duplicate post

Yes it is the prince engine, the EP6/EP6C are naturally aspirated while the turbocharged are EP6DT and EP6DTS as far as I can tell.

It could be carbon buildup, thank for you suggestion. Can I confirm that without taking the engine apart? I am thinking of a small camera inserted thru the spark plug hole.

Thank you

Regards
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Old 19-09-18, 07:58 PM   #5
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It is unlikely to be carbon build up this mainly affects turbo engines due to direct injection and no fuel to "wash" the valves like in the standard injection models

You could try cleaning VTI solenoids as it could be cause valve timing to lag any noise from timing chain etc
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Old 19-09-18, 08:24 PM   #6
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Hi, thank you for you input. I will check the solenoids valves and clean them, there is no unusual noises coming from the chain.

Regards
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Old 21-09-18, 10:08 AM   #7
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To update, I have checked solenoids valves and clean them although they were clean and functioning properly. Still got same error.

I have also swapped Camshaft position sensors position and now it seems that the trouble with misfiring is worse, it start misfiring even leaving the engine idle.

Could a Camshaft position sensors be faulty without a code set in ECU?
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Old 29-09-18, 08:51 PM   #8
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Hello i have the same issue, have you managed to resolve it yet? Thanks
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Old 30-09-18, 01:42 PM   #9
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Hi, not yet resolved. On monday we will try to replace the timing chain as I have gotten a tip that it might be the cause to my problems.
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Old 30-09-18, 01:56 PM   #10
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Swap solenoids first one could be faulty. Chain fault often you will hear it rattle on start up.
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