Hello again
Not long ago I fixed my DPF issue.
Now I have following DTC;
244B00 - Charging pressure control, low-pressure stage: Charging pressure too high
This code comes every time the same. When giving the car full beans and changing gear approx. 180km/h. This fault occurs and car goes to limp mode.
With ISTA, every test related to turbo and intake stuff PASSED. One thing seemed odd. I don't recall the test name, but it checks the charging pressure with different RPMS and moves the turbo flaps around?
It kept RPM @ 3000, and the car juddered a lot at the same time. Should this be part of the test?
Also in Live Data this seems a bit odd?
760: Variable turb. geometry controller actual value low pressure: 74.88%
761: Variable turb. geometry controller setpoint value low pressure: -1.11%
762: Variable turb. geometry controller actual value high pressure: 87.83%
763: Variable turb. geometry controller setpoint value high pressure: 0.76%
305600 - Oxygen sensor after catalytic converter, plausibility: Lambda value too low in coasting overrun mode.
This fault does not trigger anything. And "present" value of the code is always "no".
After deleting fault memory I checked live data which said the following;
Ox sens. before cat Air ratio: 0.25
Ox sens. after cat Air ratio: 4.08
This was a brief fast check at idle.
22B100 - Diesel particulate filter: Efficiency too low.
This fault comes back every time when I delete fault memory.
Differential pressure is ok, DPF regeneration is working. This code does not trigger drivetrain fail.
Any help? The car has been stage 1 tuned. It smokes a tiny bit at full throttle under certain conditions.
I have not tried accelerating to 180km/h + before the tune. So hard to say is the boost problem from the remap.
