[pysical]

I have a friend who has a 2010 N55. He just recently took off the Jb4 and went with MHD. He put on Stage 2 because he has the DP for it and stuff. Anyways, he recently got 2 codes:

2C56 - Charging pressure control, plausibility Pressure too high.
2C58 - Charging pressure control: Switch-off as consequence

He only gets these codes when he is driving around in Auto mode. When he drives in sport, it doesn' happen. So today we did some logs and noticed a issue.

I have a friend who has a 2010 N55. He just recently took off the Jb4 and went with MHD. He put on Stage 2 because he has the DP for it and stuff. Anyways, he recently got 2 codes:

2C56 - Charging pressure control, plausibility Pressure too high.
2C58 - Charging pressure control: Switch-off as consequence

Here is 3rd gear manual mode
https://datazap.me/u/pysical/dan-manual?log=0&data=3-11

I can't find anything about if the MHD Stage 2 needs the 3.5 bar map sensor, or what is going on. But as I was the one driving it did not feel like he built 20 psi in 900 rpm.

Anything to check that may be the issue?

[aaron_]

Might need to replace the Boost solenoid and silicone vacuum lines are a good idea

[pysical]

Originally Posted by aaron_

Might need to replace the Boost solenoid and silicone vacuum lines are a good idea

But he never had these codes come on when he have JB4. He took it off, then put MHD on, and then had codes the same day.

[Firewired1]

Also trying to chase a overboost situation. Just did the GFB diverter valve and want to make sure it's not the wastgate. I'm on MHD stage 2. A bunch of lines where changed. I realize it's probably the boost solenoid


https://datazap.me/u/firewired/log-1...og=0&data=4-15

[321eurotuner]

Originally Posted by aaron_

Might need to replace the Boost solenoid and silicone vacuum lines are a good idea

Replaced mine 2 weeks ago, helped a lot but still getting the same codes. Emailed twisted tuning, awaiting a solution. I also had jb4 and never had a single code.

[SnapCoupe]

Originally Posted by pysical

I have a friend who has a 2010 N55. He just recently took off the Jb4 and went with MHD. He put on Stage 2 because he has the DP for it and stuff. Anyways, he recently got 2 codes:

2C56 - Charging pressure control, plausibility Pressure too high.
2C58 - Charging pressure control: Switch-off as consequence

He only gets these codes when he is driving around in Auto mode. When he drives in sport, it doesn' happen. So today we did some logs and noticed a issue.

I have a friend who has a 2010 N55. He just recently took off the Jb4 and went with MHD. He put on Stage 2 because he has the DP for it and stuff. Anyways, he recently got 2 codes:

2C56 - Charging pressure control, plausibility Pressure too high.
2C58 - Charging pressure control: Switch-off as consequence

Here is 3rd gear manual mode
https://datazap.me/u/pysical/dan-manual?log=0&data=3-11

I can't find anything about if the MHD Stage 2 needs the 3.5 bar map sensor, or what is going on. But as I was the one driving it did not feel like he built 20 psi in 900 rpm.

Anything to check that may be the issue?

Originally Posted by Firewired1

Also trying to chase a overboost situation. Just did the GFB diverter valve and want to make sure its not the wastgate. Im on MHD stage 2. I realize its probably the boost solenoid


https://datazap.me/u/firewired/log-1...og=0&data=4-15

Are both of you on the newest version (1.53) of MHD? I am using 1.53 Stage 2 right now and I have no overboosting issues. When the beta for 1.5x was released, there was A LOT of logs that looked similar to both of yours on the Stage 2/2+ maps. For the most part it looks like it was all fixed with the official 1.53 release.

[321eurotuner]

Originally Posted by SnapCoupe

Are both of you on the newest version (1.53) of MHD? I am using 1.53 Stage 2 right now and I have no overboosting issues. When the beta for 1.5x was released, there was A LOT of logs that looked similar to both of yours on the Stage 2/2+ maps. For the most part it looks like it was all fixed with the official 1.53 release.

Yeah that’s what’s giving me issues, I had 1.24 and was fine. The newest maps are giving me issues, to include timing. I’m sure the timing is coming from the 5300 ft altitude here in ABQ and 91 octane but I’m FBO. The car overboosts and I’m getting throttle closure from 3-6k rpm. It’s pretty bad.

[Firewired1]

Swapped boost solenoid with a local 135i owner last night and my car drives soooooo much better. Datalog to follow (tablet is dead)