[Scantrell]

I had three lights flash on while driving. Yellow brake yellow traction control light and and exclamation point with circle and (○) around it. Any ideas what this could be? (2012 BMW 335i n55) also getting code P10D9 if anyone knows what causes that also, I'm lost.

[DiFFv1]

Originally Posted by Scantrell

I had three lights flash on while driving. Yellow brake yellow traction control light and and exclamation point with circle and (○) around it. Any ideas what this could be? (2012 BMW 335i n55) also getting code P10D9 if anyone knows what causes that also, I'm lost.

P10D9 - Rail pressure sensor, signal: Permanently stuck

Check your sensor for damage and/or loose connection. May have to replace or if possible clean.

[Scantrell]

Originally Posted by DiFFv1

P10D9 - Rail pressure sensor, signal: Permanently stuck

Check your sensor for damage and/or loose connection. May have to replace or if possible clean.

I have a jb4 is that where one of the connections connects to? You think maybe its loose or maybe the connection is backwards

[DiFFv1]

Originally Posted by Scantrell

I have a jb4 is that where one of the connections connects to? You think maybe its loose or maybe the connection is backwards

Check.

[Scantrell]

Originally Posted by DiFFv1

Check.

I checked, all the connections are right. Car won't start now. I installed the hpfp 2 days ago it worked fine until this morning it wouldn't start after trying about 15 times I finally got it to stay running but was idling very rough.

[Scantrell]

Originally Posted by Scantrell

I checked, all the connections are right. Car won't start now. I installed the hpfp 2 days ago it worked fine until this morning it wouldn't start after trying about 15 times I finally got it to stay running but was idling very rough.

I'm thinking it may just be a bad sensor like you mentioned in my other post.. Talked to my local delaership and they price matched fcp euro! (Which is new didn't think they'd do that) with a new sensor picking it up tomorrow hopefully it fixes the issue.

[DiFFv1]

Originally Posted by Scantrell

I checked, all the connections are right. Car won't start now. I installed the hpfp 2 days ago it worked fine until this morning it wouldn't start after trying about 15 times I finally got it to stay running but was idling very rough.

Remove connections (Jb4) and see if the car will start. Re-install connections and make sure you have a good ground. You need codes for further solutions.

[Scantrell]

Originally Posted by DiFFv1

Remove connections (Jb4) and see if the car will start. Re-install connections and make sure you have a good ground. You need codes for further solutions.

Only code I was getting is p10d9

[Scantrell]

Originally Posted by DiFFv1

Remove connections (Jb4) and see if the car will start. Re-install connections and make sure you have a good ground. You need codes for further solutions.

I was looking around the hpfp and I noticed the round drum piece with the lip around it came off the hpfp. I put it back into the pump maybe that's what's causing this there was also alot of oil around it.

[Scantrell]

Originally Posted by Scantrell

I was looking around the hpfp and I noticed the round drum piece with the lip around it came off the hpfp. I put it back into the pump maybe that's what's causing this there was also alot of oil around it.

To get it to start I have to feather the throttle alot and keep trying over and over agian. Once it starts it idles fine but after after shutting it off and it sitting a while it gives me trouble agian.

[DiFFv1]

Originally Posted by Scantrell

To get it to start I have to feather the throttle alot and keep trying over and over agian. Once it starts it idles fine but after after shutting it off and it sitting a while it gives me trouble agian.

Ive heard this problem before and not saying itll help you but your regulator could be going bad causing the car to hesitate upon start up. i still believe your problem could be the sensor, But it seems you should check the complete fuel system to find your issue. (HPFP, LPFP, Fuel regulator, Fuel rail sensor)

[Pladi]

Originally Posted by Scantrell

To get it to start I have to feather the throttle alot and keep trying over and over agian. Once it starts it idles fine but after after shutting it off and it sitting a while it gives me trouble agian.

What you need to do is log your sensor with MHD. That way you know for sure that the sensor value is ok. I have had this issue the sensor will literally output ZERO at times and the car has no way of knowing how much fuel pressure is provided or it thinks no fuel pressure so it doesn't attempt to start.

However there is a difference between high imedence OPEN circuit where the DME thinks oh the sensor is not even installed and a ZERO output but the DME knows that sensor is installed. So you need to read the sensor value to know more..

I somehow was getting water on top of that sensor causing issues.

[Scantrell]

New sensor didnt fix the issue

[Scantrell]

Originally Posted by Scantrell

New sensor didnt fix the issue

hooked up to mhd these are my codes
DME Active Codes
-2BEE- High Fuel Pressure, Plausibly, Cold Start: Pressure to low.
-2E0F- valvetronic system: deactivated , adjustment fault to frequent.

DME Shadow Codes
-2BDE - Fuel High Pressure During Fuel Injection Release: Pressure to low