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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 02-13-2013, 06:54 PM
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528i 528i is offline
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Location: Seattle
 
Join Date: Apr 2004
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Mein Auto: ist schwarz
Just had an Inspection 2.. Questions about some faults

So I picked up my car after hours, the shop made a note of a few faults, and I hoped you folks could shed some light. Written as is:

----
FAULTS:
Secondary air system
relay
Currently not present
Fault frequency 1 time.

AUC sensor is faulted

Oil level sensor is faulted

multiple supply voltage faults
---

I did a search like a good boy and found a solution (I think for the AUC sensor), and this video makes replacing the oil level sensor easy:

though I'm not sure how willing I am to drain all the oil to get to that point.

I am confused on the secondary air system and "multiple supply voltage" faults.
Are these things I should have them retest? Maybe a bad battery?

Last edited by 528i; 02-13-2013 at 07:01 PM.
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  #2  
Old 02-13-2013, 07:16 PM
occhis occhis is offline
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Location: Westford, PA
 
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Mein Auto: 1998 528iA
Or you could check your oil on a regular basis. Mine has been throwing that fault for over 150,000 miles.
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Old 02-13-2013, 09:13 PM
ian@jewelorjalopy ian@jewelorjalopy is offline
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Mein Auto: 2000 540it Sport - sold
Or wait until the next oil change, drain the oil, replace the sensor, done.

I can't help much with the other faults.
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Old 02-13-2013, 11:33 PM
edjack edjack is offline
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Mein Auto: '97 540i 6 speed
We are generally conversant with P-codes. Based on your notes, it will be difficult to help.

If you plan to troubleshoot/repair this car, best get a scan tool and the Bentley manual. This is not a '56 Ford.
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Old 02-14-2013, 04:42 AM
JimLev JimLev is offline
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Mein Auto: 540/6, S60 Volvo, Tribeca
What year 528, the build date is on the drivers door post? You may not have a secondary air system. If you don't have the CEL on then I wouldn't loose any sleep over this.

If everything is working OK I'd clear the codes and see if any come back, they could be old codes that were stored in memory.
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