Just had an Inspection 2.. Questions about some faults - Bimmerfest - BMW Forums

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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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Old 02-13-2013, 06:54 PM
528i's Avatar
528i 528i is offline
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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:

Secondary air system
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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Old 02-13-2013, 07:16 PM
occhis occhis is offline
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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.
Either you are part of the solution, or you are part of the problem.
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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.

Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.
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Old 02-14-2013, 04:42 AM
JimLev JimLev is offline
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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.

2000 540/6 Slightly tweeked...everywhere
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