Charging pressure faults

Enabled · 02-09-2019, 12:07 PM

See screenshot. Let me know you don't have all those available.

The rest will need to have a connection to the car.
Look through the DPF submenu (no idea why it's called that way) and INJECTION FUEL, for charge air pressure nominal (request) and actual.

And many other parameters if you snoop around.
Towards the bottom of jobs list there are dozens of other relevant parameters.

Keep in mind, the boost values will be in absolute pressure: atmospheric+boost.

Enabled · 02-09-2019, 12:14 PM

Be sure to also check your egr delete plates, etc.

kdog_x · 02-09-2019, 12:40 PM

I can't seem to get it to connect, I just get this error. I do connect using an icom A3, will that not work?

kdog_x · 02-09-2019, 12:59 PM

Well, that's all the charge my laptop has. Guess I'll have to mess with it later

Enabled · 02-09-2019, 01:27 PM

Yea, ICOM will work as well. That's what I use, as I don't have an ENET. You just have to use itoolradar to get icom IP and set up ediabas using easyconnect

FaRKle! · 02-10-2019, 11:35 AM

Quote:

Originally Posted by kdog_x

I removed the entire ducting system again and re-seated the connections to the turbo. Did not see anything loose. The only connection I'm not super happy about is the left side of the air filter assembly. It seems like it just slips together though. is there any additional trick to installing this side, I assume that connection is just pulling in cold outside air?

The intake/airbox connection you highlighted won't have any effect on that under-boost code you're getting. The MAF is after the filter box on the pipe that the box feeds into. If you have a leak it means it's in the turbo to intercooler connection/pipe, intercooler, intercooler to manifold pipe, venturi (pieces where EGR feeds into), or the manifold itself.

You might want to check your intercooler for any punctures. A pressure test on that can probably be run pretty easily.

kdog_x · 02-11-2019, 08:07 AM

Quote:

Originally Posted by FaRKle!

The intake/airbox connection you highlighted won't have any effect on that under-boost code you're getting. The MAF is after the filter box on the pipe that the box feeds into. If you have a leak it means it's in the turbo to intercooler connection/pipe, intercooler, intercooler to manifold pipe, venturi (pieces where EGR feeds into), or the manifold itself.

You might want to check your intercooler for any punctures. A pressure test on that can probably be run pretty easily.

Is there an ISTA function to pressure test the intercooler?

FaRKle! · 02-11-2019, 11:56 AM

Quote:

Originally Posted by kdog_x

Is there an ISTA function to pressure test the intercooler?

No, you'd have to pull it and block off the inlet/outlets and find a way to pressurize it.

You can make those pieces with some silicone couplers, pipe end caps, worm drive clamps, and a schrader valve.

Enabled · 02-11-2019, 12:15 PM

These work incredibly well for all types of leaks
https://www.ebay.com/itm/264134468462

kdog_x · 02-15-2019, 10:14 AM

Knock on wood, but so far the errors havent come back since pulling everything apart and reseating it last weekend. Could be I unknowingly fixed whatever it was. If it returns I'll have to look into the pressure testing or smoke testing.

kdog_x · 04-03-2019, 04:08 PM

Well, The check engine lights have continued. I got the OBD fusion app and have been logging commanded boost versus actual boost. There really isn't anything too exciting to see though. They seem to follow each other in a very predictable manner. I'm guessing the only way this loggingwould be useful it would be to see it when the error actually occurs. Unfortunately that is only once every 50 to 500 miles.

The code that it reads indicates that it is a overboost condition. Can anyone fill me in on what exactly causes over boost?

Enabled · 04-03-2019, 04:42 PM

Have these errors for overboost just now started coming up, or could they have been there for a much longer time?
Overboost is not really an error for the smoke machine to solve. On a tuned car, there can be too many variables on what may have caused it.
Seeing the boost follow requested is good news.

When you get the error, use ISTA-D to pull the environmental conditions when it happened. It will give you a lot more clues.

kdog_x · 04-24-2019, 10:43 AM

Turns out the charging pressure sensor is just the MAP sensor that is located right on top of the intake manifold. It came up as a short to ground yesterday and the car was stuck on "drivetrain malfunction" mode. The car was still driveable, but noticeably different since it's guessing at the boost pressure.

I had the sensor overnighted but I wasn't really sure what sensor it was going to be until it arrived lol. Luckily that was an easy one, Had it replaced in 5 minutes.. I notice the old one had a lot of crud on it, so I can see why it wasn't happy. I cleaned what I could reach in the mounting hole with a 6 inch q-tip. The inside of the intake manifold is definitely a caked mess.

Vladut · 05-21-2023, 05:09 PM

hello, I cleaned the intake manifold and I get these errors, the car went crazy for a while, it was losing power and coming back, can you help me with some advice? thank you

kdog_x · 05-23-2023, 07:18 AM

It looks like the sensor is working properly from the diagnostics that you ran. The measured values all seem to be where it says they should be.

I would think your issue probably has more to do with that "Short Circuit to B+" error code. I would maybe follow the wiring loom that goes to the sensor as far as you can follow it and look for any pinching or damage.

D-seljoy · 11-07-2023, 11:36 PM

Hi! I’m new to this forum. Here’s my situation. Brought my x5 35d into dealership for coolant loss and egr recall. After repair, sluggish acceleration and later cel. Brought back to dealership and they said that was car is tuned and that they couldn’t don’t anything unless they default program it. Husband bought used from dealership not knowing it was tuned. Gave them to ok to reprogram it but then they said they weren’t going to bc they didn’t want to mess up car. The code was charging pressure too high. Recommend replace turbo. I was worried that after egr recall triggered fault code and that turbo was fine. Took to two independent shops and they both said it was turbo. Spent $6+grand on replacement of turbo. Still feel that egr cooler is causing car to rev during deceleration. I don’t have anywhere to go to have anyone experienced with x5 diesel tuning to help. Anyone with suggestions greatly appreciated. Thx

02-09-2019, 12:07 PM	#23
Enabled Lieutenant Colonel 1410 Rep 1,805 Posts Drives: 328xd Wagon, M2 Competition Join Date: Jun 2018 Location: Houston iTrader: (0)	See screenshot. Let me know you don't have all those available. The rest will need to have a connection to the car. Look through the DPF submenu (no idea why it's called that way) and INJECTION FUEL, for charge air pressure nominal (request) and actual. And many other parameters if you snoop around. Towards the bottom of jobs list there are dozens of other relevant parameters. Keep in mind, the boost values will be in absolute pressure: atmospheric+boost. Attached Images __________________ -2014 328d Wagon, 8HP. Self-tuned, 270hp/430ft-lbs. -2019 M2 Competition MT, Alpine White. Self-tuned 560hp -2016 Mini Cooper S, MT. Many plans. Others: -E36 328is. 2000 Z3 Roady. 2003 VW Jetta TDI Manual. Estoril Z3M Coupe.
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02-09-2019, 12:14 PM	#24
Enabled Lieutenant Colonel 1410 Rep 1,805 Posts Drives: 328xd Wagon, M2 Competition Join Date: Jun 2018 Location: Houston iTrader: (0)	Be sure to also check your egr delete plates, etc. __________________ -2014 328d Wagon, 8HP. Self-tuned, 270hp/430ft-lbs. -2019 M2 Competition MT, Alpine White. Self-tuned 560hp -2016 Mini Cooper S, MT. Many plans. Others: -E36 328is. 2000 Z3 Roady. 2003 VW Jetta TDI Manual. Estoril Z3M Coupe.
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02-09-2019, 12:40 PM	#25
kdog_x First Lieutenant 197 Rep 368 Posts Drives: 14 328d Join Date: Nov 2016 Location: Chicago iTrader: (0)	I can't seem to get it to connect, I just get this error. I do connect using an icom A3, will that not work? Attached Images
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02-09-2019, 12:59 PM	#26
kdog_x First Lieutenant 197 Rep 368 Posts Drives: 14 328d Join Date: Nov 2016 Location: Chicago iTrader: (0)	Well, that's all the charge my laptop has. Guess I'll have to mess with it later
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02-09-2019, 01:27 PM	#27
Enabled Lieutenant Colonel 1410 Rep 1,805 Posts Drives: 328xd Wagon, M2 Competition Join Date: Jun 2018 Location: Houston iTrader: (0)	Yea, ICOM will work as well. That's what I use, as I don't have an ENET. You just have to use itoolradar to get icom IP and set up ediabas using easyconnect __________________ -2014 328d Wagon, 8HP. Self-tuned, 270hp/430ft-lbs. -2019 M2 Competition MT, Alpine White. Self-tuned 560hp -2016 Mini Cooper S, MT. Many plans. Others: -E36 328is. 2000 Z3 Roady. 2003 VW Jetta TDI Manual. Estoril Z3M Coupe.
	Appreciate 0 Quote

02-11-2019, 12:15 PM	#31
Enabled Lieutenant Colonel 1410 Rep 1,805 Posts Drives: 328xd Wagon, M2 Competition Join Date: Jun 2018 Location: Houston iTrader: (0)	These work incredibly well for all types of leaks https://www.ebay.com/itm/264134468462 __________________ -2014 328d Wagon, 8HP. Self-tuned, 270hp/430ft-lbs. -2019 M2 Competition MT, Alpine White. Self-tuned 560hp -2016 Mini Cooper S, MT. Many plans. Others: -E36 328is. 2000 Z3 Roady. 2003 VW Jetta TDI Manual. Estoril Z3M Coupe.
	Appreciate 0 Quote

02-15-2019, 10:14 AM	#32
kdog_x First Lieutenant 197 Rep 368 Posts Drives: 14 328d Join Date: Nov 2016 Location: Chicago iTrader: (0)	Knock on wood, but so far the errors havent come back since pulling everything apart and reseating it last weekend. Could be I unknowingly fixed whatever it was. If it returns I'll have to look into the pressure testing or smoke testing.
	Appreciate 0 Quote

04-03-2019, 04:08 PM	#33
kdog_x First Lieutenant 197 Rep 368 Posts Drives: 14 328d Join Date: Nov 2016 Location: Chicago iTrader: (0)	Well, The check engine lights have continued. I got the OBD fusion app and have been logging commanded boost versus actual boost. There really isn't anything too exciting to see though. They seem to follow each other in a very predictable manner. I'm guessing the only way this loggingwould be useful it would be to see it when the error actually occurs. Unfortunately that is only once every 50 to 500 miles. The code that it reads indicates that it is a overboost condition. Can anyone fill me in on what exactly causes over boost?
	Appreciate 0 Quote

04-03-2019, 04:42 PM	#34
Enabled Lieutenant Colonel 1410 Rep 1,805 Posts Drives: 328xd Wagon, M2 Competition Join Date: Jun 2018 Location: Houston iTrader: (0)	Have these errors for overboost just now started coming up, or could they have been there for a much longer time? Overboost is not really an error for the smoke machine to solve. On a tuned car, there can be too many variables on what may have caused it. Seeing the boost follow requested is good news. When you get the error, use ISTA-D to pull the environmental conditions when it happened. It will give you a lot more clues. __________________ -2014 328d Wagon, 8HP. Self-tuned, 270hp/430ft-lbs. -2019 M2 Competition MT, Alpine White. Self-tuned 560hp -2016 Mini Cooper S, MT. Many plans. Others: -E36 328is. 2000 Z3 Roady. 2003 VW Jetta TDI Manual. Estoril Z3M Coupe.
	Appreciate 0 Quote

04-24-2019, 10:43 AM	#35
kdog_x First Lieutenant 197 Rep 368 Posts Drives: 14 328d Join Date: Nov 2016 Location: Chicago iTrader: (0)	Turns out the charging pressure sensor is just the MAP sensor that is located right on top of the intake manifold. It came up as a short to ground yesterday and the car was stuck on "drivetrain malfunction" mode. The car was still driveable, but noticeably different since it's guessing at the boost pressure. I had the sensor overnighted but I wasn't really sure what sensor it was going to be until it arrived lol. Luckily that was an easy one, Had it replaced in 5 minutes.. I notice the old one had a lot of crud on it, so I can see why it wasn't happy. I cleaned what I could reach in the mounting hole with a 6 inch q-tip. The inside of the intake manifold is definitely a caked mess.
	Appreciate 0 Quote

05-21-2023, 05:09 PM	#36
Vladut New Member 0 Rep 11 Posts Drives: Bmw seria 4 Join Date: Apr 2023 Location: Romania iTrader: (0) Garage List [0.00]	hello, I cleaned the intake manifold and I get these errors, the car went crazy for a while, it was losing power and coming back, can you help me with some advice? thank you Attached Images
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05-23-2023, 07:18 AM	#37
kdog_x First Lieutenant 197 Rep 368 Posts Drives: 14 328d Join Date: Nov 2016 Location: Chicago iTrader: (0)	It looks like the sensor is working properly from the diagnostics that you ran. The measured values all seem to be where it says they should be. I would think your issue probably has more to do with that "Short Circuit to B+" error code. I would maybe follow the wiring loom that goes to the sensor as far as you can follow it and look for any pinching or damage.
	Appreciate 0 Quote

11-07-2023, 11:36 PM	#38
D-seljoy Registered 0 Rep 1 Posts Drives: 2015 x5 35d Join Date: Nov 2023 Location: Dallas, Texas iTrader: (0)	Hi! I’m new to this forum. Here’s my situation. Brought my x5 35d into dealership for coolant loss and egr recall. After repair, sluggish acceleration and later cel. Brought back to dealership and they said that was car is tuned and that they couldn’t don’t anything unless they default program it. Husband bought used from dealership not knowing it was tuned. Gave them to ok to reprogram it but then they said they weren’t going to bc they didn’t want to mess up car. The code was charging pressure too high. Recommend replace turbo. I was worried that after egr recall triggered fault code and that turbo was fine. Took to two independent shops and they both said it was turbo. Spent $6+grand on replacement of turbo. Still feel that egr cooler is causing car to rev during deceleration. I don’t have anywhere to go to have anyone experienced with x5 diesel tuning to help. Anyone with suggestions greatly appreciated. Thx Last edited by D-seljoy; 11-08-2023 at 12:19 AM..
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