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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 03-26-2013, 09:19 AM   #1 (permalink)
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Exclamation Several Questions (528i)

Hey Y'all,
I'm new to this forum so please be patient with me

I have a few problems with my 1997 BMW 528i:
The first is my traction control light and ABS light are on. They came on after I got my shocks and struts replaced. My cruise control works, my speedometer works, those pesky lights are the only thing wrong. I took it to the mechanic where he ran the code and told me that it was Speed Sensor A. Where is this located?

The second question is the man who ran my codes told me as well that my car was burning too much fuel. Could this be an oxygen sensor?

Thanks for the help,
Erin
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Old 04-05-2013, 10:46 PM   #2 (permalink)
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There's a wire from the wheel sensor, that may have been dislodged during the install.

The man who ran your codes may possibly be looking at your car as a steady moneymaker.
Have you written the odometer mileage on all your gas receipts? That will tell you your real gas mileage.
BTW, my wife consistently gets 15% better mileage than I do. So your mpg issue might be that right foot. ;+}

How much did he charge you to run your codes? I was just at Oreilly, and they had a code reader for $40. Cheap POS, but useful.
If it really WAS your oxygen sensor, there's a dash light for that. And a code for that.
It may be about time to replace it anyway, but no light and no code means no problem.

And if you're looking for parts and where they go, checkout realoem dot com.
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Old 04-07-2013, 01:26 PM   #3 (permalink)
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The code that shows is p0420 and po430 and the check engine light is on. Could this be the two pre-cat sensors?
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Old 05-01-2013, 06:00 PM   #4 (permalink)
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p420 it usually a cat eficiency code,the other thing is chekc the above mentioned wires they might have snapped one , if it wasnta problem before last post cat 02 would be the problem if they were out of spec, good luck
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Old 05-04-2013, 11:45 AM   #5 (permalink)
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Code P0420 is Bank 1 Oxygen Sensor - Effieciency Below Threshold

Bank 1 is the first 3 cylinders. You can try replacing the sensor, but if it returns then you need to replace the cat. Whats your milage? The life expectancy of the cats is only 150,000-200,000 miles. So depending on your milage you may just be better off getting a new cat.

P0430 is the same, but Bank 2.
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Old 05-10-2013, 04:15 AM   #6 (permalink)
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How is the car running for you? Whats the fuel efficency like?
Any signs of a a failing cat (rotten egg smell in the exhaust gases)?
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