"Engine Malfunction: reduced power!" & "Increased Emissions" - BMW M5 Forum and M6 Forums
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post #1 of 17 Old 3rd August 2008, 03:48 AM Thread Starter
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"Engine Malfunction: reduced power!" & "Increased Emissions"

Just got these dreaded warnings this afternoon! the first one happened after I had been driving about 15 miles or so, nothing excessive. continued to my destination and left her alone for about 30 minutes and started her back up... everything seemed ok. I even stayed in P400 mode, then on the drive back home got both warnings!!??
and yes I did a search on the subject.... just wondering who has had similar experiences... and if there is any chance it will "self-correct"???

"Itís easy to grin when your ship comes in and youíve got the stock market beat. But the man worthwhile, is the man who can smile, when his shorts are too tight in the seat."
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post #2 of 17 Old 3rd August 2008, 06:09 AM
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Quote:
Originally Posted by OTDoc View Post
Just got these dreaded warnings this afternoon! the first one happened after I had been driving about 15 miles or so, nothing excessive. continued to my destination and left her alone for about 30 minutes and started her back up... everything seemed ok. I even stayed in P400 mode, then on the drive back home got both warnings!!??
and yes I did a search on the subject.... just wondering who has had similar experiences... and if there is any chance it will "self-correct"???
You should really take it to BMW ASAP. My 2007 M5 did the same thing and completely died on the freeway. BMW Germany was prepared to install a new engine, intake and header set. After refusing that deal, it worked out as I received an M6 for my trouble.

Believe it or not, the same engine malfunction warning light came on in the M6. The dealership put the car on the computer and it was simply a misfire. So to answer your question, in this instance, it "self-corrected". This hasn't happened again, so the M6 is in good shape.

Well good luck!
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post #3 of 17 Old 3rd August 2008, 06:02 PM
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if it were just increased emissions warning and not reduced power with lower redline (limp mode) I wouldn't get worried about it. But with limp mode there are several possible sources and it's better to know what it is before assuming it's no big deal and waiting for it to clear itself. They should be able to tell you what is causing it readily by looking at the fault codes on OBDII. I say bring it in.

PS. NV M6's experience sure ran the gamut. One limp mode got him another car, the other meant nothing.

Euro headlamps, Evosport headers, Dinan exhaust and stage 1 Software, H&R spacers, de-charcoal, BMC filters, Angel ibright 3.0,

Last edited by TimK; 3rd August 2008 at 06:04 PM.
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post #4 of 17 Old 3rd August 2008, 08:53 PM
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post #5 of 17 Old 6th August 2008, 03:53 AM Thread Starter
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i appreciate the input, taking it in to the dealer in the morning... got my fingers crossed. I'll keep everyone posted

"Itís easy to grin when your ship comes in and youíve got the stock market beat. But the man worthwhile, is the man who can smile, when his shorts are too tight in the seat."
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post #6 of 17 Old 6th August 2008, 03:55 AM
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post #7 of 17 Old 7th August 2008, 12:13 AM Thread Starter
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good news!! (unless i was going to get a new one). The air filter was coming loose from the air mass meter... this was diagnosed over the phone by my Dinan dealer. Drove it home from the dealer without incident (about 20 miles- 10 miles on freeway). thanks for all the input. it truly is nice having this forum to post questions and concerns where people take the time to respond....thanks

"Itís easy to grin when your ship comes in and youíve got the stock market beat. But the man worthwhile, is the man who can smile, when his shorts are too tight in the seat."
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post #8 of 17 Old 7th August 2008, 12:19 AM
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glad to hear it my friend!!

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post #9 of 17 Old 21st August 2008, 04:34 PM
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Red Face Dinan Cold Air Intakes?

Quote:
Originally Posted by OTDoc View Post
good news!! (unless i was going to get a new one). The air filter was coming loose from the air mass meter... this was diagnosed over the phone by my Dinan dealer. Drove it home from the dealer without incident (about 20 miles- 10 miles on freeway). thanks for all the input. it truly is nice having this forum to post questions and concerns where people take the time to respond....thanks
I assume you have the Dinan cold air intakes? I had them installed. I have heard that the filters inside the airbox can come off (some of the first ones are doing this). It is good the car recognizes this letting us know, and we don't go around driving the car without the filter in place.

It does make one wonder about $2500 airboxes with falling off filters though....

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post #10 of 17 Old 21st August 2008, 07:13 PM
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Originally Posted by snowball View Post
I assume you have the Dinan cold air intakes? I had them installed. I have heard that the filters inside the airbox can come off (some of the first ones are doing this). It is good the car recognizes this letting us know, and we don't go around driving the car without the filter in place.

It does make one wonder about $2500 airboxes with falling off filters though....

Just had mine refitted as well.

2006 M5--Sapphire black/sepang
Dinan: free flow exhaust, Stage 3 engine software, high flow throttle bodies, high flow air mass meter/intake Assemblies, stage 2 suspension, 13% underdrive crankshaft pulley, 5.8 liter stroker engine, Dinan middle exhaust section, custom headers (I think I am finally done)

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