[nordik1]

My M2 drivetrain malfunction occurred last night while driving at high speeds.
I have a Fi 200 cell downpipe and cat-back exhaust system.
Tune did not.

120208 Charging pressure control; plausibility Pressure too high
120408 Charging pressure control; Switch-off as consequence

I already read an article in Bimmerpost that had the same phenomenon as me.
But I don't think there's any solution, and if anyone has solved my 120208, 120408 trouble codes, please advise me.
My car drove about 4,000 miles and was three months old.

And I wonder if downpipe has any effect on fault codes.
If it doesn't affect it, is it a problem with the pressure transducer? Is it an oxygen sensor problem? to be curious

[M2guru]

I can't help much, but this appears to be related to the electrical charging system and not the turbocharging or exhaust system according to http://bmwfault.codes.

[nordik1]

Originally Posted by M2guru

I can't help much, but this appears to be related to the electrical charging system and not the turbocharging or exhaust system according to http://bmwfault.codes.

According to the content of the site you mentioned, it appears to be an error in the electronic part or a error in the charging pressure sensor.
After the warning lamp has occurred, there has been continuous 2 to 3 high rpm and high speed driving, but there will be no warning lamp again.

Can these errors occur on a one-time basis???

[M2guru]

The code is likely saved so you could bring it to the dealer to get their opinion (or just call them with the code). Otherwise, I'd wait to see if it happens again then go in.

[itchyfingers]

Just to share after encountering both Pressure High and Pressure Low on my BMW 640 N55 Engine.

The above was finally resolved after some probing here and there.

My issue was related to the air channel having cracked after 7 years of use in the asia region where its temperatures are consistently over 30 deg celc.The main air channel was cracked in 2 places and that caused the pressure high error. After replacing it, power is restored and doesnt' re-appear. Perhaps this is one area you could look out for.

The pressure low was due to vacuum tubings getting flattened after some years. These are easily changed out too.

[Axleo21]

Originally Posted by itchyfingers

Just to share after encountering both Pressure High and Pressure Low on my BMW 640 N55 Engine.

The above was finally resolved after some probing here and there.

My issue was related to the air channel having cracked after 7 years of use in the asia region where its temperatures are consistently over 30 deg celc.The main air channel was cracked in 2 places and that caused the pressure high error. After replacing it, power is restored and doesnt' re-appear. Perhaps this is one area you could look out for.

The pressure low was due to vacuum tubings getting flattened after some years. These are easily changed out too.

Hello hi , help haha.
Same problem with you.
The main air channel you mentioned , what’s the parts suppose to be called ?
And the vacuum tubings , is it pipe ?