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  #1  
Old 11-04-2011, 01:57 PM
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35d EGR valve?

Has anyone had it replaced? Did it fix the CEL or did they have to swap other parts?

Last edited by cetane; 11-04-2011 at 02:07 PM.
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  #2  
Old 11-04-2011, 10:11 PM
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See my thread "CEL came on this week". My issue caused several EGR faults but the real issue was the "charging air temp sensor" which feeds data to the EGR controller.
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Old 11-05-2011, 12:14 AM
ard ard is offline
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Quote:
Originally Posted by cetane View Post
the CEL
"the" cel? As there are 300 possible defects that can set a CEL, asking if replacing the EGR will fix any given CEL is pointless.

Having said that, I've not heard of CELs due to EGR valves on these diesels...

Without knowing your codes, it is impossible to venture a guess as to what the real cause might have been....
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Old 11-05-2011, 01:04 AM
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Quote:
Originally Posted by ard View Post
"the" cel? As there are 300 possible defects that can set a CEL, asking if replacing the EGR will fix any given CEL is pointless.

Having said that, I've not heard of CELs due to EGR valves on these diesels...

Without knowing your codes, it is impossible to venture a guess as to what the real cause might have been....

All of my EGR faults specifically said " will not cause warning lamp".
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Old 11-05-2011, 12:33 PM
ard ard is offline
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Quote:
Originally Posted by boyce89976 View Post
All of my EGR faults specifically said " will not cause warning lamp".
and I am of the opinion that the dealer is lying.
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Old 11-05-2011, 02:14 PM
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Quote:
Originally Posted by ard View Post
and I am of the opinion that the dealer is lying.
With all due respect, I was standing shoulder to shoulder with the tech when the faults came up during the diagnosis, and watched him print them. Every EGR fault specifically said in the first line of the printout that it would not cause a warning lamp.
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Old 11-05-2011, 03:55 PM
ard ard is offline
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Quote:
Originally Posted by boyce89976 View Post
With all due respect, I was standing shoulder to shoulder with the tech when the faults came up during the diagnosis, and watched him print them. Every EGR fault specifically said in the first line of the printout that it would not cause a warning lamp.
With all due respect, were you pulling codes or were you running diagnostics? Two different things.

You do a disservice telling people "EGR Codes do not set CELs" if in fact you were running a diagnostic test and not pulling 'already set EGR faults'...

A CEL is set by a code, period. You cannot have a CEL come on without AT LEAST ONE underlying code.

In your other thread, your mechanic said there were no codes for your CEL, correct? That is why I said he is lying. He may have erased the existing (historical) codes, then run the diagnostics- which showed no 'present' codes.

Again- 'set codes in the OBD' versus 'BMW diagnostics'- different things

A
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  #8  
Old 11-05-2011, 07:35 PM
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Quote:
Originally Posted by ard View Post
"the" cel? As there are 300 possible defects that can set a CEL, asking if replacing the EGR will fix any given CEL is pointless.

Having said that, I've not heard of CELs due to EGR valves on these diesels...

Without knowing your codes, it is impossible to venture a guess as to what the real cause might have been....
Sorry I didn't have all the details when I started this thread. Here is what is causing the CEL:

4C52: Charge-air temperature sensor, plausibility. Ratio of calculated to measured air mass too high.
3FF0: Air-mass flow sensor. Charge-air temperature not plausible in rel. to remaining temperature signals.
4B82: Exhaust-gas recirculation-rate control, control deviation. Exhaust-gas recirculation rate too low/positive control deviation.


Dealer wants to replace the temp sensor and the EGR valve. However the EGR valve is not in stock and they have to ship it in from Germany. Also they said the MAF sensor might be bad. I'm not sure how two or three things could possibly go bad at the same time.
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Old 11-05-2011, 08:20 PM
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Quote:
Originally Posted by cetane View Post
Sorry I didn't have all the details when I started this thread. Here is what is causing the CEL:

4C52: Charge-air temperature sensor, plausibility. Ratio of calculated to measured air mass too high.
3FF0: Air-mass flow sensor. Charge-air temperature not plausible in rel. to remaining temperature signals.
4B82: Exhaust-gas recirculation-rate control, control deviation. Exhaust-gas recirculation rate too low/positive control deviation.


Dealer wants to replace the temp sensor and the EGR valve. However the EGR valve is not in stock and they have to ship it in from Germany. Also they said the MAF sensor might be bad. I'm not sure how two or three things could possibly go bad at the same time.
Did any of the codes include the words "permanent error"?
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  #10  
Old 11-05-2011, 10:05 PM
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Quote:
Originally Posted by boyce89976 View Post
Did any of the codes include the words "permanent error"?
I don't think so. All three say "Fault currently not present"
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