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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 08-17-2009, 06:48 AM   #1 (permalink)
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94 540 engine light on

Does this sound like it could be the o2 sensor?
1:engine light comes on and the car runs rough
2:rough idle
3:smell of gas while driving
4:taking more fuel
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Old 08-17-2009, 07:24 AM   #2 (permalink)
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Could also be the MAF, a diagnosis would tell you.
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Old 08-17-2009, 02:51 PM   #3 (permalink)
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Quote:
Originally Posted by chuck01 View Post
Does this sound like it could be the o2 sensor?
1:engine light comes on and the car runs rough
2:rough idle
3:smell of gas while driving
4:taking more fuel
It takes computer assistance to fix another computer(yours).

Take away the guesswork and, like the man ^ sez, get the car scanned.
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Old 08-21-2009, 03:33 PM   #4 (permalink)
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Or do the "stomp" way to get the code by counting the times the check engine light flashes. Check the Bentley for procedure and code definitions.
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