N57 325d/30d Boost PSI and Error Codes

ekuLUKEkul · 04-09-2021, 07:48 AM

Hi random question, so after battling EGR issues for a while I finally got a remap and delete done. Big thanks to Jason of BW Chiptune who did mine remotely. Feels exactly like standard but with a lot more torque ready to go when you need it! It's fantastic.

Measured on rolling road 191bhp standard and 434nm
Mapped 289bhp and 590nm

However! After only a few days of driving the car as much as possible I found myself already used to the extra power and even wondered if the map had deleted itself

it hadn't as I still see the traction light a lot more than I once did but I am always thinking negatively!

Today though, I decided to read the error codes with bimmerlink as I hadn't in a few weeks since double and triple checking there were definitely no EGR codes showing themselves again since the map!

There were however 2 new codes that I am unsure of what they are...

3f03 - Boost pressure sensor, signal
497d - Exhaust pressure sensor before turbine, plausibility

Does anyone know what these 2 codes mean? I haven't been able to find a clear answer.

The car seems to run completely fine to me and hasn't lost power (aside from the power loss in my mine mentioned above

)

I also checked "boost pressure" in bimmerlink and found that under full throttle hard accerlation the boost reaches a high of around 23psi

I have no idea if that psi seems right or if boost pressure is really measurable by just seeing what it peaks at when flooring it?

But any advice on the codes or understanding the boost pressure psi is greatly appreciated.

Thanks.

Silver Streek · 04-09-2021, 12:14 PM

Did you clear them then rescan to see if they came back?

ekuLUKEkul · 04-10-2021, 05:55 AM

Quote:

Originally Posted by Silver Streek

Did you clear them then rescan to see if they came back?

Sorry forgot to add. Yeah I reset them and since they have not come back on, I didn't drive much however and don't know if more miles will change that. I will scan again after more time and see what's reappeared.

Regardless, is them appearing once a course for concern? I regularly scanned the car prior and never saw these specific codes.

rasa bmw · 04-10-2021, 08:20 AM

Quote:

Originally Posted by ekuLUKEkul

Hi random question, so after battling EGR issues for a while I finally got a remap and delete done. Big thanks to Jason of BW Chiptune who did mine remotely. Feels exactly like standard but with a lot more torque ready to go when you need it! It's fantastic.

Measured on rolling road 191bhp standard and 434nm
Mapped 289bhp and 590nm

However! After only a few days of driving the car as much as possible I found myself already used to the extra power and even wondered if the map had deleted itself

it hadn't as I still see the traction light a lot more than I once did but I am always thinking negatively!

Today though, I decided to read the error codes with bimmerlink as I hadn't in a few weeks since double and triple checking there were definitely no EGR codes showing themselves again since the map!

There were however 2 new codes that I am unsure of what they are...

3f03 - Boost pressure sensor, signal
497d - Exhaust pressure sensor before turbine, plausibility

Does anyone know what these 2 codes mean? I haven't been able to find a clear answer.

The car seems to run completely fine to me and hasn't lost power (aside from the power loss in my mine mentioned above

)

I also checked "boost pressure" in bimmerlink and found that under full throttle hard accerlation the boost reaches a high of around 23psi

I have no idea if that psi seems right or if boost pressure is really measurable by just seeing what it peaks at when flooring it?

But any advice on the codes or understanding the boost pressure psi is greatly appreciated.

Thanks.

Jason has said you should change boost pressure sensor and your exhaust pressure sensor needed doing/replaced. And to phone his shop middles ex etc also get sensors from BMW

ekuLUKEkul · 04-10-2021, 11:36 AM

Quote:

Originally Posted by rasa bmw

Quote:

Originally Posted by ekuLUKEkul

Hi random question, so after battling EGR issues for a while I finally got a remap and delete done. Big thanks to Jason of BW Chiptune who did mine remotely. Feels exactly like standard but with a lot more torque ready to go when you need it! It's fantastic.

Measured on rolling road 191bhp standard and 434nm
Mapped 289bhp and 590nm

However! After only a few days of driving the car as much as possible I found myself already used to the extra power and even wondered if the map had deleted itself

it hadn't as I still see the traction light a lot more than I once did but I am always thinking negatively!

Today though, I decided to read the error codes with bimmerlink as I hadn't in a few weeks since double and triple checking there were definitely no EGR codes showing themselves again since the map!

There were however 2 new codes that I am unsure of what they are...

3f03 - Boost pressure sensor, signal
497d - Exhaust pressure sensor before turbine, plausibility

Does anyone know what these 2 codes mean? I haven't been able to find a clear answer.

The car seems to run completely fine to me and hasn't lost power (aside from the power loss in my mine mentioned above

)

I also checked "boost pressure" in bimmerlink and found that under full throttle hard accerlation the boost reaches a high of around 23psi

I have no idea if that psi seems right or if boost pressure is really measurable by just seeing what it peaks at when flooring it?

But any advice on the codes or understanding the boost pressure psi is greatly appreciated.

Thanks.

Jason has said you should change boost pressure sensor and your exhaust pressure sensor needed doing/replaced. And to phone his shop middles ex etc also get sensors from BMW

Sorry Rasa deleted my last reply as I misunderstood your comment! Sorry about that, I misread lol.

I can order OEM parts no problem.

rasa bmw · 04-11-2021, 01:18 AM

Quote:

Originally Posted by ekuLUKEkul

Sorry Rasa deleted my last reply as I misunderstood your comment! Sorry about that, I misread lol.

I can order OEM parts no problem.

sorry,wait,,ive spoken to jason,,you are the guy that went to sunderland yeh ?then do not do what i said,,he has gotten mixed up,as he had same car in at middlesex,,,i will contact him today and see what he says,,maybe join bimmerforum.he is a sponsor on that bmw forum

ekuLUKEkul · 04-11-2021, 05:25 AM

QUOTE]sorry,wait,,ive spoken to jason,,you are the guy that went to sunderland yeh ?then do not do what i said,,he has gotten mixed up,as he had same car in at middlesex,,,i will contact him today and see what he says,,maybe join bimmerforum.he is a sponsor on that bmw forum[/QUOTE]

Yes I went to performance centre Sunderland. I am on bimmerforum as well as here. Do you think it is worth messaging Jason? I am going to rescan the car today but when I deleted the error memory nothing had reappeared after a couple of small journeys.

As I say all feels well with the car so I'm not sure if it is just a red herring.

rasa bmw · 04-12-2021, 01:52 AM

Quote:

Originally Posted by ekuLUKEkul

QUOTE]sorry,wait,,ive spoken to jason,,you are the guy that went to sunderland yeh ?then do not do what i said,,he has gotten mixed up,as he had same car in at middlesex,,,i will contact him today and see what he says,,maybe join bimmerforum.he is a sponsor on that bmw forum

Yes I went to performance centre Sunderland. I am on bimmerforum as well as here. Do you think it is worth messaging Jason? I am going to rescan the car today but when I deleted the error memory nothing had reappeared after a couple of small journeys.

As I say all feels well with the car so I'm not sure if it is just a red herring.[/QUOTE]could be taght pc never cleared codes afterv remap,,they will have done a before and after scan of the car,,,yes contact jason and explain

ekuLUKEkul · 04-12-2021, 03:53 AM

Thanks Rasa will message him to be sure. I know they definitely were cleared and it's appeared since then as I scanned the car as soon as I got home on the day just to see that the EGR was definitely gone!

I since haven't scanned for a few weeks until the other day when I noticed these new codes so it is something in the last few weeks that triggered them.

I scanned yesterday again after another small round trip to Tesco. Still no boost pressure codes, the only codes currently present are the glow plug module and an AUC sensor (even the fuel heater has not returned could be the warming weather?)

Just to add there was no EML or anything present even with the boost codes. Honestly nothing seems wrong with the car at all, it's only that I decided to scan it randomly that I was even aware of these 2 new codes.

ekuLUKEkul · 04-26-2021, 07:57 AM

Just to update here. The codes didn't reappear for a little while however I scanned again today just to check and 2 have reappeared. The boost pressure code (3f03) hasn't returned but the two I now have is:

4B7F - exhaust pressure sensor before turbine, signal (this one is new)
497D - exhaust pressure sensor before turbine, plausibility

The car runs fine and I haven't noticed any changes.

04-09-2021, 07:48 AM	#1
ekuLUKEkul Private First Class 17 Rep 177 Posts Drives: E91 325d LCI Join Date: Jun 2016 Location: Middlesbrough iTrader: (0)	N57 325d/30d Boost PSI and Error Codes Hi random question, so after battling EGR issues for a while I finally got a remap and delete done. Big thanks to Jason of BW Chiptune who did mine remotely. Feels exactly like standard but with a lot more torque ready to go when you need it! It's fantastic. Measured on rolling road 191bhp standard and 434nm Mapped 289bhp and 590nm However! After only a few days of driving the car as much as possible I found myself already used to the extra power and even wondered if the map had deleted itself it hadn't as I still see the traction light a lot more than I once did but I am always thinking negatively! Today though, I decided to read the error codes with bimmerlink as I hadn't in a few weeks since double and triple checking there were definitely no EGR codes showing themselves again since the map! There were however 2 new codes that I am unsure of what they are... 3f03 - Boost pressure sensor, signal 497d - Exhaust pressure sensor before turbine, plausibility Does anyone know what these 2 codes mean? I haven't been able to find a clear answer. The car seems to run completely fine to me and hasn't lost power (aside from the power loss in my mine mentioned above ) I also checked "boost pressure" in bimmerlink and found that under full throttle hard accerlation the boost reaches a high of around 23psi I have no idea if that psi seems right or if boost pressure is really measurable by just seeing what it peaks at when flooring it? But any advice on the codes or understanding the boost pressure psi is greatly appreciated. Thanks.
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04-09-2021, 12:14 PM	#2
Silver Streek Lieutenant 119 Rep 599 Posts Drives: 325d E91 Join Date: Feb 2018 Location: The Moon iTrader: (0)	Did you clear them then rescan to see if they came back?
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04-11-2021, 05:25 AM	#7
ekuLUKEkul Private First Class 17 Rep 177 Posts Drives: E91 325d LCI Join Date: Jun 2016 Location: Middlesbrough iTrader: (0)	QUOTE]sorry,wait,,ive spoken to jason,,you are the guy that went to sunderland yeh ?then do not do what i said,,he has gotten mixed up,as he had same car in at middlesex,,,i will contact him today and see what he says,,maybe join bimmerforum.he is a sponsor on that bmw forum[/QUOTE] Yes I went to performance centre Sunderland. I am on bimmerforum as well as here. Do you think it is worth messaging Jason? I am going to rescan the car today but when I deleted the error memory nothing had reappeared after a couple of small journeys. As I say all feels well with the car so I'm not sure if it is just a red herring.
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04-12-2021, 03:53 AM	#9
ekuLUKEkul Private First Class 17 Rep 177 Posts Drives: E91 325d LCI Join Date: Jun 2016 Location: Middlesbrough iTrader: (0)	Thanks Rasa will message him to be sure. I know they definitely were cleared and it's appeared since then as I scanned the car as soon as I got home on the day just to see that the EGR was definitely gone! I since haven't scanned for a few weeks until the other day when I noticed these new codes so it is something in the last few weeks that triggered them. I scanned yesterday again after another small round trip to Tesco. Still no boost pressure codes, the only codes currently present are the glow plug module and an AUC sensor (even the fuel heater has not returned could be the warming weather?) Just to add there was no EML or anything present even with the boost codes. Honestly nothing seems wrong with the car at all, it's only that I decided to scan it randomly that I was even aware of these 2 new codes.
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04-26-2021, 07:57 AM	#10
ekuLUKEkul Private First Class 17 Rep 177 Posts Drives: E91 325d LCI Join Date: Jun 2016 Location: Middlesbrough iTrader: (0)	Just to update here. The codes didn't reappear for a little while however I scanned again today just to check and 2 have reappeared. The boost pressure code (3f03) hasn't returned but the two I now have is: 4B7F - exhaust pressure sensor before turbine, signal (this one is new) 497D - exhaust pressure sensor before turbine, plausibility The car runs fine and I haven't noticed any changes.
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