[JaxD]

Hey everyone, I'm back because I'm having some really strange issues with my 2013 335i (n55). I was on my way home from work, about 5k rpm in third, when I noticed a sudden loss in boost. Limped it 2 miles home and parked it to check codes. Idled fine during reading, but I turned it off to clear any codes (which didnt work) and now upon start up I am met with normal idle, immediately followed by a loud whine, then the engine cuts. I've never heard anything like it. I attached a video that I took. Haven't attempted to try the motor since or until I find out whats wrong with it. Only code I got was 135704, but It should be noted that code was labeled as "not currently active but recent" and even with the ignition on it now shows no codes.

https://photos.app.goo.gl/eNLxcWuvY6g9bHbDA

[ronnymedrano]

Originally Posted by JaxD

Hey everyone, I'm back because I'm having some really strange issues with my 2013 335i (n55). I was on my way home from work, about 5k rpm in third, when I noticed a sudden loss in boost. Limped it 2 miles home and parked it to check codes. Idled fine during reading, but I turned it off to clear any codes (which didnt work) and now upon start up I am met with normal idle, immediately followed by a loud whine, then the engine cuts. I've never heard anything like it. I attached a video that I took. Haven't attempted to try the motor since or until I find out whats wrong with it. Only code I got was 135704, but It should be noted that code was labeled as "not currently active but recent" and even with the ignition on it now shows no codes.

https://photos.app.goo.gl/geometry dash subzero/eNLxcWuvY6g9bHbDA

As I know, the code 135704 indicates that there is a problem with the Valvetronic system, but I also don't know why and how to solve. Sorry.

[XxThe_RemedyXx]

Below is what ISTA says about the code. Have you checked your battery voltage?

Fault description The diagnosis monitors the control accuracy of the Valvetronic system.

Fault monitoring conditions:

The fault is detected when the control accuracy of the Valvetronic system is insufficient

Conditions for fault healing when permanent SAE fault is stored:

The engine must be idling for 60 seconds.

Condition for fault memory entry Temperature precondition:

- None

Time precondition:

- None

Other preconditions:

- None

Control unit voltage: 9 V to 16 V.

Terminal 15 on

The fault is entered immediately.

Measure in service - Run VVAK test module.

- Note: Temporary undervoltage is the most frequent fault cause here.

Breakdown instruction: The engine is operated in throttled mode, full vehicle operation/power output

slightly increased fuel consumption

Service instruction: - None.

Perceptible effect on customer Malfunction indicator lamp