Performance loss at higher speeds under load Peugeot B

Hi there...

I have a problem with our Peugeot Boxer, manufactured in 2012, with engine code AQV.
The car initially runs normally, but when it gets warm under load, the power completely drops out or goes into limp mode. I turn the ignition off and on again, and it runs perfectly normally.

"The error code reads 'Foreign air in the system'." Now I had already replaced the air-to-water cooler because it had a hole, and I thought that would fix the problem. I then let the car run for about an hour while stationary, and no error occurred. Then I wanted to drive home, but it went back into limp mode. I have inspected all the hoses, and I haven't found any cracks or anything like that.

What could it be? Previously, there was also a defective LLM, which I had replaced, and since then there have been no more error entries.

Can it be that the air intake sensor now also has a way or what else could it be?

Detailed diagnostic tests on the AGR and VTG systems were successfully completed. He also builds up the loading pressure until the error.

Best regards

Go ahead and take a look at the air intake system.

Unfortunately, I don't have a way to shorten the intake length. Go to the garage again tomorrow and take a picture of the error code. I forgot to write it down.

Should I perform another measurement? Why does it run normally again after the ignition is switched off?

Best regards

Last edited on 08-02-2017, 9:42, edited 2 times in total.

The fault code will be reset when the ignition is turned off/on, as the engine control unit hopes that the car has been repaired.

Best regards, Rainer

08-02-2017, 8:44 Subject: Performance loss at higher speeds under load Peugeot B

Hi...
Wanted to follow up. The car seems to have a remarkable self-healing ability. I planned to go to the workshop the next day to read the error code again, but the error was gone. I have now driven the car for 4000 km and there have been no further problems. I've never experienced anything like this before.
I was able to delete the errors before, but they kept reappearing. Now, everything is quiet. I can't say what it was, but I'm happy to say so!

Best regards, Jan

08-02-2017, 8:52 Subject: Performance loss at higher speeds under load Peugeot B

This is the wonderful electricity of the French. She has biological self-healing abilities... unfortunately, this also makes her just as vulnerable

08-02-2017, 9:44 Subject: Performance loss at higher speeds under load Peugeot B

Thank you for the feedback!