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Old 27-04-19, 06:44 AM   #1
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Default 407 2.2 HDI Engine light 3.5K Rpm P0100

Hi all,

I have had this car for 7 years and it has 135K miles on the clock. I had an issue where if it was revved for 3.5K Rpm for a while it would go in limp mode and not throw up a fault. Switch off and back on and all would be fine.
This cleared itself when I had a turbo boost pressure sensor fault a while ago.

Now recently I get an engine fault come up with limp mode every time I go above 3K Rpm. When accelerating I sometimes get a loss power for a second then it comes back, I just put it down to one of those things. I also get a lack of power in 4th, 5th and 6th gear at 2K Rpm. it will accelerate but power keeps dipping until about 2.5 to 3K Rpm like its cutting the fuel. There is a flatspot around 2.7K.

I have a version of Planet, but I`m lost as what I`m doing with it, I don`t want to do something I shouldn`t. When I look at faults etc I did notice that for turbo condition it says "Single turbo operation with wastegate" is this normal for the 2.2 HDI 170?

The car drives fine with the only fault code that comes up is P1351 but from what I have read thats a normal glow plug fault. According to Planet the EGR valve opens and closes depending on the engine speed etc. The DPF is regenerating every 300 to 400 Km but it does say that I have over 32000 litres of additive left.

When I drive above 3.5K and get the fault I get code P0100 which I think is airflow not plausible but it says engine speed is over 5.5K. If I unplug the MAF it wont start but if I unplug after starting the car I still get the issues of lack of power etc.

Any help would be appreciated

Thanks
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Old 27-04-19, 08:41 AM   #2
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Crank sensor possibly as your engine speed is at 5800+ RPM when the fault occurred. Were you absolutely redlining your car at the time?
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Old 27-04-19, 08:45 AM   #3
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Try cleaning the MAF with a spray of iso-propyl alcohol or non-lubricating contact cleaner.
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Old 27-04-19, 09:11 AM   #4
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Quote:
Originally Posted by BiGK View Post
Crank sensor possibly as your engine speed is at 5800+ RPM when the fault occurred. Were you absolutely redlining your car at the time?
No only got to 3500. Don't need to go above 4000 to trigger the fault. I'll have to check Rpm readings on planet to test the crank sensor. Btw where is the crank sensor located?

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Try cleaning the MAF with a spray of iso-propyl alcohol or non-lubricating contact cleaner.
I have cleaned the MAF but could have damaged it or it's not 100% as it's old now.
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Old 27-04-19, 12:59 PM   #5
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If it has swirl flaps check the actuator module for a vac leak. It could be when flaps open you get a vac leak which then lowers boost and triggers airflow fault
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Old 27-04-19, 01:34 PM   #6
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Quote:
Originally Posted by windy1603 View Post
If it has swirl flaps check the actuator module for a vac leak. It could be when flaps open you get a vac leak which then lowers boost and triggers airflow fault
Is that easy to check or is there a guide I could look at to help. But I will look into that.

As for the high rpm I took it for a drive and if I accelerate gently I can go above 4000 rpm but if I accelerate hard I get engine fault and error code.
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Old 27-04-19, 06:52 PM   #7
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Not quite the same engine but this thread has some photos quick test is to disconnect vac to swirl actuator and block it off and see what happens

https://www.peugeotforums.com/forums...l-flaps-27889/
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Old 27-04-19, 07:36 PM   #8
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Thanks I'll have a look
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Old 27-04-19, 08:55 PM   #9
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2700rpm is when it starts using the big turbo.

"Single turbo operation with wastegate" makes me wonder whether it is not able to use the big turbo.

The big turbo is controlled by two electrovalves: VT2 controls exhaust flow to the big turbine and Vrec switches the big compressor between supplying the inlet and just recirculating air. I guess one of these wants replacing.


Graphical parameter measurements might give you some clues (example attached (VT1 is the wastegate)).

Tech docs for turbocharging: https://www.dropbox.com/s/7udk2rifk9..._info.pdf?dl=0
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Old 28-04-19, 07:43 AM   #10
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Quote:
Originally Posted by rwb View Post
Graphical parameter measurements
I tried to do Graphical with planet but I couldn`t get it to work, I also tried to install Diagbox but could not get to work either, I guess that would give me a clue as to whats going on. When I run planet I can see various values for VT2, Vrec etc but I have no idea what any of it means.

Are the electrovalves easy to get to and to check or is it a garage job? I need to find a good HDI specialist in the Cambs area.
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