EGR error codes

Sukh Singh · 02-17-2020, 07:14 AM

Hi I have the following codes and EML light on dash

4CAE - egr adjuster position sensor signal

40D4 - egr Valve position control

Going on the codes do I just need to replace the EGR valve?

(Not keen on getting it removed)

Thanks in advance!

MrSweet1991 · 02-23-2020, 09:30 AM

Does the car run a bit crap? If so maybe the EGR is caked in soot and the valve is left open slightly which would constantly let in exhaust fumes.

It also could be a vacuum issue, on the EGR valve you will see a rubber hose, this hose applies vacuum to open the valve, if this is split it won't function properly.

Sukh Singh · 03-13-2020, 11:15 AM

Quote:

Originally Posted by MrSweet1991

Does the car run a bit crap? If so maybe the EGR is caked in soot and the valve is left open slightly which would constantly let in exhaust fumes.

It also could be a vacuum issue, on the EGR valve you will see a rubber hose, this hose applies vacuum to open the valve, if this is split it won't function properly.

Hi the car runs as normal no loss of power etc?

Going to order a new EGR from the stealers I think as Euro dont sell the correct pierburg branded one

rasa bmw · 03-14-2020, 03:42 AM

just take it off and clean it

Tambohamilton · 03-14-2020, 05:12 AM

Can you take a pic of the egr valve? You may be able to check its operation without even taking it off the engine. Also there's a test routine in ISTAD which actuates the egr valve so you can see it operating.

Because you don't also have a MAF code, I think your valve might be dead, and replacement might be the only option. Definitely worth testing first, and cleaning if that seems like it might be the problem

Sukh Singh · 03-20-2020, 10:32 AM

Quote:

Originally Posted by Tambohamilton

Can you take a pic of the egr valve? You may be able to check its operation without even taking it off the engine. Also there's a test routine in ISTAD which actuates the egr valve so you can see it operating.

Because you don't also have a MAF code, I think your valve might be dead, and replacement might be the only option. Definitely worth testing first, and cleaning if that seems like it might be the problem

I did have a few other codes, not sure if they were MAF related ones....will get read again at my mates.

What would a maf code suggest?

Tambohamilton · 03-20-2020, 11:46 AM

Maf code alongside an egr code would suggest that the egr is simply stuck open or stuck closed...therefore just needing a clean to get it working again.

rasa bmw · 03-21-2020, 02:45 AM

as said and above,,get it off and cleaned,,plenty tutorials on doing it,,its a very easy job,,hardest bit is getting toone of the lower egr bolts,,although ive only ever done 6 pot m57 cars

iMirel · 04-14-2020, 02:27 AM

I also have error 4CAE, I changed the egr valve(wahler) and still have this error. I saw the by-pass valve on the cooler blocked and I clean it and now it works perfectly. I put the cooler back and clear all fault code. Still have error 4CAE and check engine. I run a diag with ISTA and EGR VALVE works perfectly.... give me some ideas I`m stuck with this problem.

Tambohamilton · 04-14-2020, 03:16 AM

I'd check continuity between the egr plug wires and their respective targets. If that all works out, I'd check resistance between each of them and ground, with the DDE unplugged. Firstly though, I'd inspect as much of the wiring as is visible for any damage etc.

gigic · 07-04-2020, 10:04 AM

I have the same problem. The by-pass valve at the egr cooler was blocked, I replaced the cooler, I cleaned the EGR valve (it was not blocked) ... the same error (4CAE) after deletion.
I will replace "Pressure Converter, exhaust control" code 11747810831
320xd, 2009

Steve007 · 02-27-2021, 04:41 AM

Morning all. My BMW e90 was running rough and had engine management light on so with Carly adapter I managed to read the codes which were 004B84, 003FF0, 0040E9, 004B82, 004B81. I then had a garage replace the brake vacuum sensor and EGR valve. I then reran the Carly and I now have the codes 004AFB, 0040E9 and 004B82.

Does this mean the new EGR valve and the brake vacuum sensors are faulty? Car runs much much better, no engine management light either.

Your help will be much appreciated.
Thank you

Steve007 · 02-27-2021, 01:47 PM

Does anyone have an idea of what the problem might be?

rasa bmw · 03-01-2021, 11:41 AM

did you clear the codes after parts were fitted ?

Steve007 · 03-01-2021, 04:29 PM

Quote:

Originally Posted by rasa bmw

did you clear the codes after parts were fitted ?

Yes. But as soon as I drive error codes reappear.

McPikie · 07-07-2021, 03:22 PM

I'm also having an EGR issue. Its put the eml up and code P0401. Seems to be driving fine and the garage I bought it from tells me it had a new solenoid and vac lines last year

02-17-2020, 07:14 AM	#1
Sukh Singh Second Lieutenant 24 Rep 217 Posts Drives: 330d Join Date: Nov 2015 Location: Midlands iTrader: (0)	EGR error codes Hi I have the following codes and EML light on dash 4CAE - egr adjuster position sensor signal 40D4 - egr Valve position control Going on the codes do I just need to replace the EGR valve? (Not keen on getting it removed) Thanks in advance!
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02-23-2020, 09:30 AM	#2
MrSweet1991 Captain 140 Rep 826 Posts Drives: BMW E90 330D M Sport Join Date: Apr 2017 Location: West Midlands iTrader: (0)	Does the car run a bit crap? If so maybe the EGR is caked in soot and the valve is left open slightly which would constantly let in exhaust fumes. It also could be a vacuum issue, on the EGR valve you will see a rubber hose, this hose applies vacuum to open the valve, if this is split it won't function properly.
	Appreciate 0 Quote

03-14-2020, 03:42 AM	#4
rasa bmw Colonel 247 Rep 2,025 Posts Drives: 640d sport/f31 330d x drive Join Date: Jul 2017 Location: northumberland iTrader: (0)	just take it off and clean it
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03-14-2020, 05:12 AM	#5
Tambohamilton Brigadier General 3295 Rep 4,222 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	Can you take a pic of the egr valve? You may be able to check its operation without even taking it off the engine. Also there's a test routine in ISTAD which actuates the egr valve so you can see it operating. Because you don't also have a MAF code, I think your valve might be dead, and replacement might be the only option. Definitely worth testing first, and cleaning if that seems like it might be the problem
	Appreciate 0 Quote

03-20-2020, 11:46 AM	#7
Tambohamilton Brigadier General 3295 Rep 4,222 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	Maf code alongside an egr code would suggest that the egr is simply stuck open or stuck closed...therefore just needing a clean to get it working again.
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03-21-2020, 02:45 AM	#8
rasa bmw Colonel 247 Rep 2,025 Posts Drives: 640d sport/f31 330d x drive Join Date: Jul 2017 Location: northumberland iTrader: (0)	as said and above,,get it off and cleaned,,plenty tutorials on doing it,,its a very easy job,,hardest bit is getting toone of the lower egr bolts,,although ive only ever done 6 pot m57 cars
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04-14-2020, 02:27 AM	#9
iMirel Registered 0 Rep 1 Posts Drives: BMW 320d Join Date: Apr 2020 Location: Bucharest iTrader: (0)	I also have error 4CAE, I changed the egr valve(wahler) and still have this error. I saw the by-pass valve on the cooler blocked and I clean it and now it works perfectly. I put the cooler back and clear all fault code. Still have error 4CAE and check engine. I run a diag with ISTA and EGR VALVE works perfectly.... give me some ideas I`m stuck with this problem.
	Appreciate 0 Quote

04-14-2020, 03:16 AM	#10
Tambohamilton Brigadier General 3295 Rep 4,222 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	I'd check continuity between the egr plug wires and their respective targets. If that all works out, I'd check resistance between each of them and ground, with the DDE unplugged. Firstly though, I'd inspect as much of the wiring as is visible for any damage etc.
	Appreciate 0 Quote

07-04-2020, 10:04 AM	#11
gigic Registered 0 Rep 1 Posts Drives: E91 Join Date: Jan 2020 Location: Romania iTrader: (0)	4CAE I have the same problem. The by-pass valve at the egr cooler was blocked, I replaced the cooler, I cleaned the EGR valve (it was not blocked) ... the same error (4CAE) after deletion. I will replace "Pressure Converter, exhaust control" code 11747810831 320xd, 2009
	Appreciate 0 Quote

02-27-2021, 04:41 AM	#12
Steve007 Registered 0 Rep 3 Posts Drives: BMW 316d e90 Join Date: Feb 2021 Location: Northamptonshire iTrader: (0)	Egr error codes Morning all. My BMW e90 was running rough and had engine management light on so with Carly adapter I managed to read the codes which were 004B84, 003FF0, 0040E9, 004B82, 004B81. I then had a garage replace the brake vacuum sensor and EGR valve. I then reran the Carly and I now have the codes 004AFB, 0040E9 and 004B82. Does this mean the new EGR valve and the brake vacuum sensors are faulty? Car runs much much better, no engine management light either. Your help will be much appreciated. Thank you
	Appreciate 0 Quote

02-27-2021, 01:47 PM	#13
Steve007 Registered 0 Rep 3 Posts Drives: BMW 316d e90 Join Date: Feb 2021 Location: Northamptonshire iTrader: (0)	Does anyone have an idea of what the problem might be?
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03-01-2021, 11:41 AM	#14
rasa bmw Colonel 247 Rep 2,025 Posts Drives: 640d sport/f31 330d x drive Join Date: Jul 2017 Location: northumberland iTrader: (0)	did you clear the codes after parts were fitted ?
	Appreciate 1 Steve0070.00 Quote

07-07-2021, 03:22 PM	#16
McPikie Lieutenant 66 Rep 450 Posts Drives: E91 320d Msport Join Date: Oct 2016 Location: Manchester iTrader: (0)	I'm also having an EGR issue. Its put the eml up and code P0401. Seems to be driving fine and the garage I bought it from tells me it had a new solenoid and vac lines last year
	Appreciate 0 Quote